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The Zoeller Sump Pump Models Review
This Zoeller Sump Pump Review explains features by model M53, M57, M63, M95, M98, M264, M266, M267 and more that are key to pump longevity, reliability, and easy maintenance.
Safeguarding your basement from flooding and water damage is paramount. Our review reveals Zoeller sump pumps feature quality construction, dependable performance, and ease of maintenance. Factors like these make Zoeller sump pumps a preferred choice among homeowners and professionals alike.
Each Zoeller model's superior reliability during critical moments and their long-lasting durability in challenging conditions ensure peace of mind and protection against potential water emergencies.
Reviewing features, benefits, and real-world performance of Zoeller sump pumps provides guidance for making an informed decision for your home's water management needs.
Why We Share This Information
We own 4 sump pumps and a sewage pump. We live in a high water table area and get a lot of rain. For the past 40 years we tried several sump pumps and learned a lot from experience. We install our own pumps. Plus we do continuous research, talk with manufacturers and attend pump training always looking for the best.
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The Zoeller Primary Submersible Sump Pump Model Similarities
The Zoeller Primary Submersible Sump Pumps (M53, M57, M63, M95, M98, M137 And Their Related Models) possess the following similarities.
- Cast iron motor housing to dissipate motor heat
- Cast iron pump housing and switch case to dissipate motor heat and add weight for minimal movement in the basin during heavy continuous pumping.
- A non-clogging impeller without the need of a screen to stop debris from getting clogged in the impeller
- Stainless steel screws, pump handle and float protection guard to remain rust proof over years of use
- Puncture proof float because it is solid buoyant, polypropylene
- Two-pole mechanical snap action float switch
- Hermetically-sealed with Upper and lower sleeve bearings running in bath of oil to aid in motor durability
- Watertight, neoprene square ring between motor and pump housing and another neoprene gasket between the pump housing and the switch case to prevent water leakage
- Automatic reset thermal overload to protect the motor from burnout
- Effluent because they pass small spherical solids through their vortex impeller,
- Double tested. Pressure tested for leaks and performance tested to ensure they meet guaranteed pumping performance charts GPH (gallons pumped per hour)
Their differences are a little more subtle model by model. These differences are identified by the following specifications: horse power, GPH, power, cord length, float ON and OFF height, material type for the impeller and pump base, pump dimensions and weight, and warranty.
The Zoeller Primary Submersible Sump Pump Model Differences
The following submersible sump pumps are made in the Zoeller USA factory. They are known as the Professional and Premium Series pumps.
Click MODEL DIFFERENCES X vs Y to see Specific Model Comparison. Scroll down the page to see all.
- The M57 impeller will last longer because it's made of cast iron. Cast iron usage for the impeller decreases the likelihood of breakage and unbalance and wear on the shaft as it rotates.
- The M57 will be more stationary in the basin because its cast iron base and impeller add weight. M53 uses engineered plastic for these parts.
- The M57 weighs more at 27.1 pounds vs the M53 weighs 21 pounds.
- The M57 costs around $30 more which is not much considering the fact that it has more cast iron.
M53 vs M57 Similarities are:
- Both are one-third horse power (HP).
- Their performance flow rate (PFR) is 34 GPM at ten feet vertical height and 2,040 GPH.
- The float ON and OFF height is preset in the factory. ON is 7-1/4 inches. OFF is 3 inches.
- Both have cast iron motor housing and pump housing with a 2-pole snap action vertical float switch.
- Their width is 10-3/32" (26.2 cm) and their height is 10-1/16" (25.6 cm).
- Both the M53 and M57 have a 3 year warranty.
M53 and M57 Con is:
- The float switch is mechanical and over time will fail (probably after 5 years). But the good news is that float switches are easy to purchase and install. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
- The M63 impeller will last longer because it is cast iron not engineered plastic. A cast iorn impeller decreases the likelihood of breakage and unbalance and wear on the shaft as it rotates
- The M63 will be more stationary in the basin because its base is cast iron not engineered plastic.
- The M63 has a 5 year warranty which is 2 more years than the M53 which is 3 years.
- The M63 power cord has an LED lighted plug which is green when house current is available to run the pump when the float switch turns the pump on.
- An additional bar is added in the M63 switch case to reduce the friction caused when the float reaches its ON height which closes the electrical circuit, turns the switch on and runs the pump motor.
- An additional Viton boot is added to provide additional protection against moisture entering the switch area and causing an electrical short.
- The M63 weighs 7 pounds more than M53. M63 weighs 28 pounds and M53 weighs 21 pounds.
- The power cord for the M63 is ten feet which is one foot longer than the cord for the M53. .
- The M63 costs around $100 because of the switch upgrades and additional cast iron parts.
M53 and M63 Similarities are:
- Both are one-third horse power (HP).
- Their performance flow rate (PFR) is 34 GPM at ten feet vertical height and 2,040 GPH.
- The float ON and OFF height is preset in the factory. ON is 7-1/4 inches. OFF is 3 inches.
- Their width is 10-3/32" (26.2 cm) and their height is 10-1/16" (25.6 cm).
- Both have cast iron motor housing and pump housing with a 2-pole vertical float switch.
M53 Con is:
- The float switch is mechanical without the enhancement and over time will fail sooner than the M63 float switch. But the good news is that float switches are easy to purchase and install for the M53. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
- The M98 has greater horse power: 1/2 HP for the M98 and 1/3 HP for the M53.
- The float ON and OFF height is preset in the factory. ON is 9-1/2 inches for the M98 though the OFF float height is the same at 3 inches.
- Their width is very close within 1/8 of an inch difference (10-3/32" 26.2 cm for the M53), but the M98 is almost 2 inches taller at 12 inches vs 10-1/8 inches.
- The M98 power cord is much longer at 15 feet vs 9 feet for the M53.
- The pumping performance of the M98 is much greater at a 10 foot vertical height. It is 61 GPM for M98 vs 34 GPM for M53 and 3660 GPH for the M98 and 2040 GPH for the M53.
- An additional Viton boot is added to provide additional protection against moisture entering the switch area and causing an electrical short.
- M98 weighs 18 pounds more than M53. M98 weighs 39 pounds and M53 weighs 21 pounds.
- The M98 costs between $120 and $140 more than the M53 because of its additional horse power and physical size which requires more cast iron and other parts.
M53 and M98 Similarities are:
- Both have cast iron motor, housing, pump housing and switch case with an engineered plastic base.
- Their warranty is the same at 3 years.
- Both have cast iron motor housing and pump housing with a 2-pole vertical float switch.
- The float switch is mechanical and over time will fail. But the good news is that float switches are easy to purchase and install for the M53. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
- The M98 has greater horse power: 1/2 HP for the M98 and 1/3 HP for the M57.
- Since M98 has a greater horse power it also has a greater pump performance which is 61 GPM at a 10 foot vertical height The M57 can only pump 34 GPM. During the span of an hour the number of gallons pumped is significant. 3,660 GPH for the M98 and only 2040 for the M57.
- The float ON and OFF height is preset in the factory. ON is 9-1/2 inches for the M98 though the OFF float height is the same at 3 inches.
- M98 is almost the same width with only 1/8 inch difference (10-3/32" 26.2 cm for the M53), but the M98 is almost 2 inches taller at 12 inches vs 10-1/8 inches for M57.
- The M57 power cord is much shorter at 9 feet vs 15 feet for the M98.
- The M57 impeller is cast iron but the impeller for the M98 is thermoplastic.
- M98 weighs 12 more pounds than the M53. The M98 weighs 39 pounds.
- The M98 costs around $100 more than M57.
M57 and M98 Similarities are:
- Both have cast iron motor, housing, pump housing and a thermoplastic base.
- Their warranty is the same at 3 years.
- Both have cast iron motor housing and pump housing with a 2-pole vertical float switch.
- Both use the same float switch which is easy to find and install. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
- The M63 has a 5 year warranty which is 2 more years than the M53 which is 3 years.
- The M63 will be more stationary in the basin because its base is cast iron not engineered plastic.
- The M63 has a 5 year warranty which is 2 more years than the M53 which is 3 years.
- The M63 power cord has an LED lighted plug which is green when house current is available to run the pump when the float switch turns the pump on.
- An additional bar is added in the M63 switch case to reduce the friction caused when the float reaches its ON height which closes the electrical circuit, turns the switch on and runs the pump motor.
- The M63 upgrade included an additional Viton boot which provides additional protection against moisture so the switch will not have an electrical short.
- The M63 weighs less than one pound more than M57. M63 weighs 28 pounds and M55 weight 27.1 pounds.
- The power cord for the M63 ten feet which is one foot longer than the cord for the M57. .
- The cost difference between the M63 and M57 is around $50. So it would make sense to purchase the M63 because it has a 2 year longer warranty.
M57 and M63 Similarities are:
- Both have cast iron motor housing, pump housing, switch case, base and impeller.
- M63 and M57 both have one-third horse power (HP)
- Their pump performance rate (PFR) is 34 GPM at ten feet vertical height and 2,040 GPH.
- The float ON and OFF height is preset in the factory. ON is 7-1/4 inches. OFF is 3 inches.
- Both have cast iron motor housing and pump housing with a 2-pole vertical float switch.
- Their width is 10-3/32" (26.2 cm) and their height is 10-1/16" (25.6 cm).
M57 Con is:
- The float switch for M57 has not been upgraded therefore it will fail sooner than the M63 float switch. But the good news is that float switches are easy to purchase and install for the M57. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
- The M95 impeller will last longer because it is cast iron not engineered plastic.
- Both the M95 and M98 will remain very stationary in the basin because of their weight.
- The M95 has a 5 year warranty which is 2 more years than the M98 which is 3 years.
- The M63 power cord has an LED lighted plug which is green when house current is available to run the pump when the float switch turns the pump on.
- An additional bar is added in the M95 switch case to reduce the friction caused when the float reaches its ON height which closes the electrical circuit, turns the switch on and runs the pump motor.
- An additional Viton boot is added to M95 provide additional protection against moisture entering the switch area and causing an electrical short.
- The M95 and M98 are very close in weight however the M98 is one pound more than the M95.
- The M95 uses more electricity than the M98. M95rates at 10.7 Amps. M98 rates at 9.4 Amps.
- The M95 is bigger with dimensions of 12-1/4 inches wide and 11 inches tall while M98 is 10-1/8 inches by 12 inches tall.
- The M95 costs around $125 more than the M98.
M95 and M98 Similarities are:
- Both are one-half horse power (HP).
- Their performance flow rate (PFR) is 61 GPM at ten feet vertical height and 3,660 GPH.
- The float ON and OFF height is preset in the factory. ON is 9-1/2 inches. OFF is 2-1/2 inches.
- Both have cast iron motor housing and pump housing with a 2-pole vertical float switch.
- The power cord for the M95 and M98 is 15 feet.
M98 Con is:
- The M98 float switch is mechanical without the enhancement and over time will fail sooner than the M95 float switch. But the good news is that float switches are easy to purchase and install for the M53. The easiest installation is buying a switch case so only a few screws need to be loosened. See the Switch replacement part now.
M57 vs M98 vs M137 differences are the M57 and M137 impeller are cast iron and the M98 impeller is engineered plastic. M57 is one-third horse-power; M98 and M137 are one-half horse power. Performance flow rate for M57 at a 10 foot vertical height is 43 GPM; M98 is 72 GPM and M137 is 79 GPM.
Zoeller Primary Submersible Sump Pump Contractors Basic Series Models Review
The following submersible sump pumps are made in the Zoeller Taiwan factory. They are known as the Contractors Basic pumps. Their features are different from the Zoeller Professional and Premium Series made in the USA factory.
- The Contractor Basic Models include 1052, 1073, 1075, 1096, 1099 and WM49.
1052 vs 1073 vs 1075 vs 1096 vs 1099
1052, 1073, 1075, 1096, 1099 Differences are:
- The Basic Models provide more horse power options: one-fourth, one-third, one-half and three-fourth HP.
- One-fourth (0.25) HP model WM49, 49-Water Riddr.
- One-third (0.33) HP models 1052, 1073.
- One-half (0.50) HP models 1075, 1096.
- Three-fourth (0.75) HP model 1099.
- Their design is different. The motor and pump housing are the same. There is no separate motor housing and pump housing.
- More than one float switch type is used: vertical magnetic reed and vertical 2-pole-snap-action.
- Warranty varies by model. Whereas, Profession series warranty is 3 years and Premium series model warranty is 5 years.
- The Zoeller Basic Models lack the Professional and Premium features that make a sump pump more dependable and durable (material and engineering design differences).
1073-001, 1075-001 vs M53, M57 Differences are:
- Price is at least $50 less than the Professional model sump pumps.
- A magnetic reed float switch is used.
- The warranty is only two years whereas the Professional Series has a three year warranty and the Premium Series has a five year warranty.
- The switch head is thermoplastic. Thermoplastic traps heat and the switch area can become hot during continuous pumping. The Profession and Premium Series have a cast iron switch head.
- Overall weight is less because of the thermoplastic switch head, base and impeller. Weight is 12.4 pounds which means the pump will more easily move during heavy continuous pumping. The Professional and Premium pumps weigh over 21 pounds each.
- The motor and pump body housing are one and the same. The Professional and Premium Series models have two layers of cast iron which keeps air from the motor so it keeps cooler during heavy pumping.
- The magnetic reed vertical float switch for the 1073 and 1075 can become contaminated by water containing calcium carbonate. As a result, the magnetic draw becomes contaminated and fails to work. Many years ago we installed sump pumps with magnetic draw vertical float switches and found they fail in two or three years because we live in an area that contains a lot of calcium carbonate. The model 1099 also uses a magnetic draw vertical float switch; however it has an additional float switch for protection when the first float switch fails. The dual float switch increases the model 1099 warranty to three years.
1052-001, 1096 vs. M53, M57, M98 Differences are:
- The 1052, 1096 and 1099 motor and pump body housing are one and the same for these models. The M53, M57, M63, M95, and M98 models have two layers of cast iron which dissipates heat generated from the running motor better during heavy pumping to ext6end the motor's life span.
1052-001, 1096 vs. M53, M57, M98 Similarities are:
- A 2-pole snap action float switch is used. Since ground water contaminates such as calcium carbonate do not affect it, these pump models are more dependable than the Models 1073 and 1075 but not as dependable as the Premium M63 and M95 with the enhanced 2-pole vertical float switch.
- A three year warranty is offered.
- Price is almost the same; however, the Professional Series engineering design offers more reliability and durability.
Zoeller has three battery-backup sump pump systems. All three models will fit in an eighteen inch diameter pit with a primary pump. Two of the models are submersible - Models 507-0005 and 508-0005. The 508 also has a Wi-Fi enabled backup pump model number 508-0014.The Model is a pedestal style backup and the motor sits above the pit and must not be submersed in water.
507-0005 vs 508-0005
507-0005 vs 508-0005 Differences are:
There are several differences between the 507-0005 vs 508-0005 battery backup water pumps.
- The 507-0005 is installed in line with the discharge pipe.
- The 508-0005 has legs and can be installed in line or free standing in the pit bottom.
- The flow rate performance is higher for the 508-0005 with a flow rate of 60 gallons per minute or 1800 gallons per hour at 10 feet dynamic height.
- The 507-0005 flow rate is 15 gallons per minute or 900 gallons per hour at a 10 foot head height.
- The 508-0005 has a redundant high water switch. If one switch fails the other one will activate.
- Model 507-0005 frequently serves as a backup for primary M53.
- The pumping capacity for the 507 at ten foot lift is 900 gallons per hour.
- If the primary runs at capacity during heavy rainstorms, installing the backup 508-005 will be more appropriate.
- Model 508-0005 moves 1800 GPH at ten foot lift.
- The Aquanot 585 moves up to 2100 GPH at ten foot lift.
- The horse power equivalency of the 507-0005 is one-fourth horse power.
- For the backup 508-0005 and 585, the horse power equivalency is one-third horse power.
507-0005 vs 508-0005 Similarities are:
- Zoeller battery backup water systems are well-built and dependable. The 507 and 508 have a vortex impeller which prevents clogging.
- The battery case for both the 507-005 and 508-005 accommodates battery sizes Group 27, Group 29, and Group 31 which offers the homeowner great flexibility for battery purchases. Both the wet cell and AGM batteries can be used. The 585 accommodates battery group sizes 27 and 31.
- The backup systems 507 and 508 offer the standard alarm notification systems - an LCD screen showing the battery voltage, and LED light indicating the battery is charging, is low and the float is activated. An alarm sounds when high water occurs, there is battery cable reverse polarity and the battery charge is low. The set of dry contacts can be connected to home security system or an auto dialer. The 585 also has an alarm system.
- The battery charger for these backups is stronger than most brands at 10 amps. The battery charger for the 585 is 28 amps which requires less time to recharge a depleted battery.
Of the three Zoeller battery backup sump pumps, the 508-0014 offers the most reliability.
- Three-fourth (0.75) HP model 1099. 2040 GPH at a 10 foot vertical height
- A dual float switch which provides redundancy in case one of the float switches fails
- A 3 year warranty
- A 10 amp battery recharger
- A self-testing controller to give peace of mine to the home owner that the backup pump is operational
- Wi-Fi connectivity
This is a good battery backup sump pump system manufactured by Zoeller, a dependable sump pump company.
The Zoeller Water Powered Pump Review By Comparison
Zoeller water powered sump pumps are great for protecting a basement from flooding is the electricity or primary pump fails. However, like all brands of water powered sump pumps, their GPM, gallons pumped per minute, is very limited so it is important to compare the Zoeller models to ensure the best GPM is chosen for your water pumping needs.
540 Flex vs 503-0005
Zoeller's latest water powered sump pump model is no longer big, clumsy looking and in the way when it comes time to remove the primary pump from the basin. Zoeller's latest water powered pump model, the 540 Flex, is small and can be installed in the ceiling rafters so it is out of sight and not in the way.
540 Flex vs 503-0005 Differences are:
The Zoeller water powered pumps, 503-0005 vs 540 Flex, differences are:
- The 540 Flex can be installed in the ceiling rafter out of sign and out of the way, however the 503-0005 must installed directly above the top of the basin and the primary pump;
- The 540 Flex uses a diaphragm float that is much smaller and durable.
- The 503-0005 relies on a large vertical float to trigger the activation of the ejector which begins the flow of city water through the pump's ejector. The pressure of the city water begins the Venturi cycle of sucking unwanted water from the basin.
540 Flex vs 503-0005 Similarities are:
The 503-0005 and the 540 Flex water powered pumps do have some similarities: one gallon of city water removes two gallons of basin water; sixty pounds of city water pressure enables them to pump most effectively; when the municipal water pressure is sixty psi, one thousand one-hundred forty gallons of water can be pumped per hour from the basin.
Homeowners who prefer not to rely on battery backup power because their backup system runs for long periods of time, find the 540 Flex and the Homeguard Max to be a great solution. No electricity or battery is required. The 540 Flex and the 503-0005 rely solely on the availability of city water and its dependable pressure.
Of Zoellers two water powered sump pumps, the 540 Flex is the best choice. It can pump 1,140 GPH at 60 PSI and it can be installed at ceiling joist height out of sight.
These Zoeller combination sump pumps are made by the Zoeller USA factory.
Combination pump systems are very popular since the alignment of two pumps is already done by the manufacturer. The system is already preassembled with a primary and battery backup pump and the homeowner only needs to attach the preassembled discharge pipe to their existing discharge pipe system. These preassembled systems eliminate the frustration of measuring and configuring the existing discharge pipe system to install two pumps separately - the primary and a backup. The combination system encourages homeowners to install their own systems and save money. Zoellers combination systems are known as the PROPak Series.
Knowing how to select a combination system is important. The most important facts the homeowner must know before selecting a combination primary and backup is how wide the existing pit is and how much water is pumped during a heavy rainstorm. Measuring the diameter of the pit is easy. Take a yardstick and lay it across the open pit, write down the number of inches. Measuring the amount of water entering the pit during a rainstorm is more challenging. See the steps for determining the size of pump needed.
PROPAK 507-0008 vs 507-0011 vs 508-0006 vs 508-0007
PROPAK 507-0008 vs 507-0011 vs 508-0006 vs 508-0007 Differences are:
Configuration Differences
- The Zoeller Combination PROPak Model 507-0008 includes the primary M53 and the backup Sentry 507-0005.
- The Zoeller Combination PROPak Model 507-0011 includes the primary M98 and the backup Sentry 507-0005.
- The Zoeller Combination PROPak Model 508-0006 includes the primary M53 and the backup Aquanot 508-0005.
- The Zoeller Combination PROPak Model 508-0007 includes the primary M98 and the backup Aquanot 508-0005.
Pumping Performance Differences
- For the Zoeller Combination PROPak Model 507-0008, at a 10 foot vertical height, the backup 507-0005 moves 30 gallons per minute and the M53 moves 34 GPM.
- For the Zoeller Combination PROPak Model 507-0011 , at a 10 foot vertical height, the backup 507-0005 moves 30 gallons per minute and the M98 moves 61 GPM.
- The Zoeller Combination PROPak Model 508-0006 at a 10 foot vertical height, the primary M53 moves 34 gallons per minute and the more powerful backup Aquanot 508-0005 moves 30 gallons per minute.
- The Zoeller Combination PROPak Model 508-0007 at a 10 foot vertical height, the primary M98 moves 61 gallons per minute and the more powerful backup Aquanot 508-0005 moves 30 gallons per minute.
Dimension Differences
- The Zoeller Combination PROPak Model 507-0008 is around 18 3/4 inches high and 13 1/2 inches wide. The backup pump can be installed inline (above the primary pump rather than on the basin bottom).
- The Zoeller Combination PROPak Model 507-0011 is around 20 inches high and 13 1/2 inches wide. The backup pump can be installed inline (above the primary pump rather than on the basin bottom).
- The Zoeller Combination PROPak Model 508-0006 is around 20 inches high and 13 1/2 inches wide. The backup pump can be installed inline (above the primary pump rather than on the basin bottom).
- The Zoeller Combination PROPak Model 508-0007 is around 20 inches high and 13 1/2 inches wide. The backup pump can be installed inline (above the primary pump rather than on the basin bottom).
- M264 is 4/10 horse power; M268 is one-half horse power.
- M268 has cast iron base while M264 base is engineered plastic.
- Performance flow rate for M264 is 90 GPM; M268 is 128 GPM.
- Shut off height for M264 is 18 feet; M268 is 21.5 feet.
- M264 Amps is 4.7 - 9.4 while M268 is 1.5 - 10.4 Amps.
- Solids handling is 2 inches for both.
- The discharge piping size for M264 is 2 inches. For M268 the discharge size can be 2 or 3 inches.
- As for weight, M264 weighs 35 pounds and M267 weighs 47 pounds.
- They both have a 2-pole mechanical vertical float switch, a non-clogging vortex impeller, can handle 2 inch solids, have an engineered plastic impeller with metal insert, and are not affected by the material in the basin.
M267 vs M268
M267 vs M268 Sewage Pump Similarities are:
- M267 vs M268 are identical except the M268 weighs a little over fifty pounds and the M267 weighs forty-seven and one-half pounds.
- The M267 and M268 have cast iron base, switch case, and housing.
- M267 as well as M268 has a 2-pole mechanical vertical float switch
- Both have a vortex impeller made of engineered plastic with a metal insert
- The power cord is ten foot power cord
- Pump performance is 128 gallons per minute
- The shut off height is 21.5 feet
- The discharge size is 2 or 3 inches
- The float ON point is twelve inches and the OFF point is four inches.
The N267 and N268 come as a non-automatic sewage pump. The non-automatic (manual) pump has two advantages: 1) when the float switch fails the pump does not have to be removed from the basin; 2) the ON OFF point can be customized by raising or lowering the float. Since the float switch used for a non-automatic pump is attached to the discharge piping system, only the float needs to be removed from the basin. If you wish to do your own maintenance, this is a great idea.
E270 and M280 Differences are:
The E270 and M280 Series Sewage pumps come with a lot of power - one horse power; however they have several differences.
- The E270 Series has a maximum head shut off height of twenty-nine feet and the M284 has a shut-off height of thirty-five feet; so both work well where much discharge pipe height and distance are involved.
- The M280 Series is completely cast iron including the impeller. The E270 series has an engineered plastic impeller.
- The flow rate for the E270 series is 132 gallons per minute whereas the M280 series has a flow rate of 179 GPM.
- The cord length for the M280 series is ten feet whereas the cord length for the E270 series is twenty feet.
- Primary sump pumps run on electricity (AC - Alternating Current) therefore, their power capability is measured in horse-power. Horse power along with motor efficiency determine the performance of a sump pump (gallons of water pumped in one minute - GPM).
-Horse-power ranges from one-fourth to one HP (1/4 or 0.25 to 1 HP for sewage). When comparing the performance with other manufacturers, generally Zoeller 1/4 HP pumps can remove as much water from the pit in a specified amount of time as a 1/3 HP of a competitors pump. Likewise, a 1/2 HP can generally pump as much as a 3/4 HP competitors.
One-fourth Horsepower
- One-fourth HP is for those homeowners who have an average amount of water during a heavy rainfall or that have a steady flow of water from the drain tile but not a heavy flow. One-third horsepower is for those who have a heavier flow from the drain tile, but not so much that the sump pump cannot keep up with the flow. One-half horsepower is for those who have a heavy gushing of water from the drain tile.
- The 1/4 HP Models include 49-0005 Water Riddr. The performance of this model is 32 GPM (gallons per minute) or 1920 GPH (gallons per hours at a 5 foot lift and 25 GPM or 1500 GPH (gallons per hour) at a 10 foot lift height.
One-third Horsepower
- The 1/3 HP Models include M53, M55, N55 (Non-Automatic), M57, BN57 (Non-Automatic), M59, N59 (Non-Automatic), M63.
- The pumping performance is 43 GPM or 3580 GPH at a 5 foot lift and 34 GPM or 2040 GPH (gallons per hour) at a 10 foot lift height.
One-half Horsepower
- The 1/2 HP Models include M76, M95, M98, M137, N137 (Non-Automatic), M139, and N139 (Non-Automatic).
- The pumping performance for the M76 is 50 GPM or 3000 GPH at a 5 foot lift and 40 GPM or 2400 GPH (gallons per hour) at a 10 ft. height.
- The pumping performance of M95 is 80 GPM or 4800 GPH at a 5 foot lift and 66 GPM or 3660 GPH (gallons per hour) at a 10 foot height.
- The pumping performance of M98 is 72 GPM or 4320 GPH at a 5 foot lift and 61 GPM or 3660 GPH (gallons per hour) at a 10 foot height.
- The pumping performance of the M137, N137, M139, N139 is 93 GPM or 5580 GPH at a 5 foot lift and 79 GPM or 4740 GPH (gallons per hour) at a 10 foot height.
All Zoeller Pump screws, guard and handle are stainless steel. Stainless steel will not rust and has strength.
Thermoplastic
- Construction material makes a difference in durability. Thermoplastic can get hot, warp, and crack when it is used under strenuous pumping conditions.
- The only Zoeller pumps with engineered thermoplastic are the M72 and M76. Their pump base, impeller, and shaft are also thermoplastic.
Glass-filled polypropylene
Glass-filled polypropylene is stronger than engineered thermoplastic. This is why it is used for the pump base, housing, shaft and impeller for M53. The M98 and M137 Impeller are also made from glass-filled polypropylene.
Cast Iron
- Cast iron is very durable. It dissipates heat and will not warp or crack. Cast iron is epoxy coated to resist corrosion.
- The M53 motor-housing, pump-housing case, cap and bearings are made of cast iron. The pump base is engineered thermoplastic. The impeller is made of engineered glass filled plastic with a metal insert.
- The M57 motor-housing, pump-housing, pump base, impeller, cap, shaft, switch case and bearings are made of cast iron.
- The M63 motor-housing, pump-housing, pump base, impeller, cap, shaft, switch case, shaft and bearings are made of cast iron.
- The M95 and M98 motor-housing, pump-housing, cap, base and bearings are made of cast iron. The impeller is engineered plastic.
- The M137 and N137 motor-housing, pump-housing, base, bearings, cap and impeller are made of cast-iron.
Bronze
- Bronze is even more durable and stronger than cast-iron. It is a great construction material for sump pumps; however it is much more expensive.
- The M55 switch case, motor-housing, pump-housing and bearings are made of bronze. The pump base is engineered thermoplastic and the impeller and shaft are engineered, glass-filled plastic with metal insert.
- The M59 switch case, motor-housing, pump-housing, impeller, shaft and bearings are made of bronze.
- The M139 switch case, motor-housing, pump-housing, impeller, shaft and bearings are made of bronze.
The homeowner has some flexibility in determining the ON and OFF point of the motor by lessening some of the slack of the tether.
Tether Float Disadvantages
The tethered float requires the widest pit diameter to operate. The tether and float can tangle and get hung up most easily.
How The Tethered Float Switch Works
The operation of the tethered float is simple. As the water rises in the pit, the ball at the end of the tether begins to rise and swing out. When the ball is high enough the switch will trigger the motor to run. As the water lowers in the pit so does the ball and tether.
The WM49, 49-0005 the Water Ridd'r III, has a tethered float switch and requires a 12 inch diameter-pit.
2-Pole Vertical Float Switch
2-pole Vertical Float Switch Advantages
- The two-pole vertical float requires less pit diameter.
- It has a protective guard that protrudes from the switch box to prevent the float from getting caught
- The float is held securely in place at the top and bottom
- The float is made of solid polypropylene so puncturing will not cause it to fail.
- The float switch it not affected by ground water contaminates such as calcium carbonate.
2-pole Vertical Float Switch Disadvantages
- The ON and OFF point of the pump cannot be altered.
- The switches are expected to last three to five years depending on the frequency of pumping.
- Zoeller has tested it to 1 million pump cycles.
- It is best to have a replacement switch on hand. It is easy to purchase and replace the Zoeller 2-pole vertical switch.
How 2-pole vertical float switch works
- The operation of the two-pole float-switch is simple. As the water rises in the pit, the float rises ever so slightly. When the float is high enough the switch will trigger the pump to run. As the water lowers in the pit so does the float.
- The M53, M55, M57, M59, M63, M76, M95, M98, M137, M139 Have a two-poled vertical float-switch.
- The vortex impeller is the best design for preventing the impeller from clogging with debris. All Zoeller pumps can handle debris; however the size of solids handled varies by model.
- The vortex impeller does not require periodic cleaning like manufacturers who use bottom suction with a bottom screen or those who use top suction. All sump basins have some kind of debris whether it be small pea gravel or something larger; the issue is how pumps are designed to handle it.
Models By Size Of Solids Handling
-3/8 in. solids-handling: Models 49-0005, M76
-1/2 in. solids-handling: Models M53, M55, N55, M57, BN57, M59, N59, M63, M95 and M98
-5/8 in. solids-handling: Models 137, N137, M139, and N139.
- The ON and OFF point for the Zoeller sump pump using a two-pole mechanical float-switch is preset at the factory; thus the homeowner cannot make a change.
- Homeowners installing a pump with a tethered float-switch can slightly modify the ON position.
- Homeowners installing a pump with an independent float-switch can determine the ON height of the pump since the float-switch is not attached to the sump pump but to the discharge pipe.
- The greater the distance between the ON and OFF point, the less frequently the pump will run and less short cycling will occur.
- ON 7 3/8 inches OFF 3 5/8 inches means only 3 3/8 inches of water is removed during one pumping cycle if the pump is not running continuously. In an eighteen in. diameter-pit this would only be around 4-6 gallons of pit water.
- ON 7 1/4 inches OFF 3 inches. Models M53, M55, M57, M59, and M63 are preset with the ON position of 7 1/4 inches and the OFF position of 3 inches. This means every time 4 gallons of water entered the pit the pump would run because in an eighteen inch diameter-pit one in. equals around one gallon of pit water.
- ON 8 1/2 inches OFF 3 3/4 inches. Model M76 is preset with the ON position of 8 1/2 inches and the OFF position of 3 3/4 inches. This means when the water in the sump pit rises 4 1/4 inches the float will trigger the motor to run. Each time the pump cycles around 4-6 gallons of pit water will be removed.
- ON 9 1/2 inches OFF 3 inches. Model M98 is preset with the ON position of 9 1/2 inches and the OFF position of 3 inches. At this preset position around six or seven gallons of water can enter the basin before the float will trigger the motor to run. Each time the M98 pumps in an eighteen inch wide basin, approximately 7 - 9 gallons of water will be pumped from the pit.
- ON 10 inches OFF 2 3/4 inches. Model M137 and M139 are preset with the ON position of 10 inches and the OFF position of 2 3/4 inches. This preset position means around 8 - 10 gallons of sump water can be removed when the pump is for one cycle in an eighteen inch diameter pit.
The length of the power cord becomes important when the wall outlet is not close to where the sump pump is installed.
It is important to note that each pump should have its own wall outlet. Plugging in more than one pump in the same electrical outlet (circuit) may cause the circuit breaker to trip because of over load. In addition, a sump pump should not be plugged into an extension cord.
Models By Power Cord Length
-Nine Foot Power Cord: Models 49-0005, M53, M55, M57, M59, and M76.
-Ten Foot Power Cord: Model M63. Model M63 has a power cord with an LED lighted plug end which can be easily seen.
-Twelve Foot Power Cord: Models M137 and M138.
-Fifteen Foot Power Cord: Models M95, M98, N137, and N139. Model M95 has a power cord with an LED lighted plug end which can be easily seen.
-Sixteen Foot Power Cord: Non-Automatic models - N55, BN57, and N59.
Amperage determines how much electricity is used. Amperage is converted to kilowatt hours to determine how much it costs to run a Zoeller Sump Pump.
Models By AMPs Used
Model 49-0005 uses 3.8 amps.
Model M76 uses 5 amps.
Model M98 uses 9.4 amps.
Models M53, M55, BN55, M57, N57, M59, N59. and M63 use 9.7 amps.
Models M137, N137, M139, and N139 use 10.7 amps.
Shut OFF Head Height Maximum Pumping Height
- The shut off head height for the M53, M55, M57, and M59 is nineteen feet three inches.
- The M63 shut off head height is nineteen feet six inches.
- The shut off head height for M98, M137 and M139 is twenty three feet.
- The M95 has a shut off height of twenty-six feet.
- For M75, M76 is shut-off-height is twenty-five feet.
- For M49, M72, and M73 the shut-off-height is eighteen feet.
The Dimensions
The width of the Model 50 Series and the Model 90 Series is the same at ten and 3/32 inches wide. The difference is in the height. The M50 Series Models are ten and 1/8 inches high. Whereas the M95 is twelve and 1/8 inches high and M98 is twelve inches high.
The specific dimensions for the submersible primary sump pumps is:
All Zoeller models have a three year warranty except for 1073, 1075, M63 and M95.
- Zoeller 1073 and 1075 have a one year warranty because the housing is made of engineered plastic.
- Zoeller M63 and M95 have a five year warranty because they have an ungraded switch tested to 3 million pump cycles, a viton sleeve at the switch arm and and LED light plug.
Zoeller is very confident of the durability of their pumps and rightfully so because plumbers recommend them above other brands because these pumps are built to function for many years. Some consumers have had them run for as long as 25 years. Ours is over 18 years old and pumping fine. If the float-switch is replaced every three to five years depending upon frequency of use, they will continue to pump for years.
Brad from Chicago says the Zoeller pumps are built like a tank. They are made of heavy quality cast iron. The housing is built to last. The cast iron will not rust because it is epoxy coated. The float is solid and cannot fail if it gets punctured. The parts for the pump are all made and assembled in the USA. The sales sheet indicates each pump is tested before it leaves the factory. The float switch is tested for over one million runs. He likes Zoeller pump products.
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Discover Why Plumbers Recommend Zoeller
Watching plumbers explain the differences between Zoeller and other pump manufacturers helps the homeowner to understand what features (specifications) are important and why Zoeller is rated as the number one sump pump.
Discover the difference found inside the pump and why plumbers recommend these pump products.
The Zoeller sump pump can now be purchased by home owners online. This is great news for the homeowner. Buying online saves money and time.
What Makes Zoeller Unique?
- All Zoeller M and N Model submersible sump pumps and their parts are made in the USA.
- They are 100% factory tested underwater to guarantee dependability when you plug it in the first time. Those who work in the factory take pride in their work.
- Zoeller Pumps are referred to as 'The Plumbers Choice'.
- Zoeller is the oldest independently owned U.S. pump manufacturer (1939) still making pumps in the USA.
- Full line of pump types are available: primary submersible, battery backup, water powered, combination (primary + backup) and pedestal, laundry, sewage.
Zoeller is progressive and upgrades its pumps. The popular M53 and M98 are upgraded to M63 and M95. They have a better switch with a five year warranty. The battery backup Aquanot Fit 508 has built-in Wi-Fi for Z Control connectivity. The 540 Flex is a complete design change for the Water Powered Backup pump. What a beauty!
- Zoeller still makes its pumps in the USA and double tests each pump before it leaves the factory so it will work when installed.
- Zoeller pumps are still the plumber's favorite. The pumps are made with quality cast iron including the motor housing. Cast iron dissipates heat well during continuous pumping and adds weight so the pump remains stationary during heavy continuous pumping.
The following information provides a comparison and an in-depth review of the Zoeller primary, backup and sewage pumps. There are many features gen to all Zoeller pumps.
The Zoeller Sump Pump Is Different Inside
Zoeller provides a lot of training regarding the 'inside' of their sump pumps and what makes them different. This makes Zoeller pumps unique and highly rated by home owners and plumbers.
How Is A Zoeller Pump Different Inside? Let's Take A Look.
-Pump housing is made of cast iron not plastic which overheats. Cast iron dissipates heat better than aluminum, zinc, carbon steel and stainless steel as well.
-Vortex impeller is used instead of an inlet screen. Vortex impeller allows small solids to flow through so there is no screen to clog.
-Motor is not canned. Zoeller makes their own motors which are larger and directly touching the outside housing. Plus they use cast iron for motor housing so there are actually two layers of cats iron: the motor housing and the pump housing. Many manufacturers purchase canned motors, which use aluminum for motor housing, from a third party and place them inside their pump housing. A canned motor inside an outside housing does not dissipate heat as well and causes additional wear on the motor.
-Twenty percent motor capacity is unused during continuous operation which results in longer motor life. Most manufacturer motor run to full capacity during continuous operation.
-Four pole motor is used and therefore does not rotate as fast like many manufacturers who use the two pole motor.
-The vertical float is not hollow therefore it will not fill with water if punctured. Many manufacturers have hollow floats which sink if punctured.
- Clearance is found between where the impeller spins and where the water is sucked in. This prevents clogging.
Keep the above features in mind as you learn about model differences. It's the differences that are highlighted model by model.
Zoeller Pumps are easy to install. Check the Owner's Manual, follow the steps below and watch the video.
Steps to Install Zoeller Sump Pump
STEP 1
Find the threaded 1 1/2 inch male adapter and screw it into the pump discharge port. Tighten it up.
STEP 2
Cut a piece of 1 1/2 inch PVC discharge pipe long enough to go above the float-switch guard when screwed into the male adapter. Prime and glue the cut piece in place.
STEP 3
Install a no-hub coupling on the top of the piece glued in place in step two.
STEP 4
Set the pump into the pit. Make sure it sits squarely on the bottom with no obstructions on the side.
STEP 5
Make sure you have a check valve installed in the discharge pipe to be attached to the no-hub. It is wise to install a new check valve every time a new pump is installed. In fact, a quiet check valve is a great solution to prevent water knocking.
STEP 6
Take your existing discharge pipe coming down into the pit and attach it into the top end of the no-hub coupling. Tighten the coupling. If the pump passes the test, you are done. If you have some leaks, check your fittings. Make sure they are really tight.
Here are tips for determining what size sump pump is needed for your water pumping needs. If you are new to sizing your sump pump, check out more details on the 'How To Size Sump Pump' page.
- Take a yardstick. When the pump has just stopped running during a heavy rain, stick the yardstick in the pit. Use your watch to time how many inches the water rises in 60 seconds. If too much water enters the pit in 60 seconds, try timing it for 30 seconds and multiply the number of inches the water rose on the yardstick by two. If it is necessary to time the water for fifteen seconds measure the number of inches the water rose in fifteen seconds and multiply it by four.
- Every inch in an eighteen inch diameter pit is approximately one gallon. In a twenty-four inch diameter pit one inch is approximately two gallons. If five inches of water entered an eighteen inch diameter pit in fifteen seconds, we would take five multiplied by four which equals twenty. Twenty is equivalent to twenty gallons of water in one minute.
- One last important measurement is the height from the pump-port where the vertical discharge pipe connects. Measure the height of the vertical pipe. Most systems have a vertical pumping height of around ten feet.
- Look at the manufacturers performance chart in the spec sheet. The manufacturers spec sheet includes a performance curve indication water volume pumped at a vertical height.
- For example, if twenty gallons of water needs to be pumped per minute from the pit, the M53 will be a great choice since it can move up to 34 gallons per minute at a 10 feet vertical height. The backup pump which can move up to 30 gallons per minute is the 508-005. The combination system, 508-0006 would be best for your water pumping needs.
How To Solve Six Common Pump Problems
1. If the pump will not start, check the following: the fuse or circuit breaker for blown, impeller for mechanical binding, motor or wiring for shorting, float assembly for being held down, or float switch for being defective.
2. If the motor overheats or trips circuit breaker or blows a fuse, check if voltage is correct or motor is shorted,
3. If pump starts and stops too often, a larger pit may be required, the check valve may have failed and needs replacement.
4. If the pump will not shut off, debris may be lodged under the float assembly and needs to be removed; the switch may be defective and require replacement; the gasket may be misaligned or worn out and needs replacement.
5. If the pump operates but delivers little or no water, the weep hole (vent hole) may be clogged and needs cleaning; the discharge head may too great for the pumps capacity and a larger horse power pump needs to be installed.
6. If the pumping capacity decreases after a period of use, check for a clogged discharge pipe line or clogged check valve.
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Sis Periodic Maintenance Tips
1. Clean the basin of debris. Debris can obstruct the float and impeller.
2. Clean the weep hole (air vent hole).
3. Clean the impeller.
4. Replace the switch after three to four years of heavy usage and less frequently if usage is light.
5. Clean the check valve of collected pebbles or debris.
6. Check the outside drainage pipe as well because it can get clogged.
Without performing periodic maintenance, the main-pump may fail during crucial times like heavy rainstorms; therefore maintenance is important as well as a backup sump for protection in case the electrical power fails or the main-pump fails.
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Quick Shop Zoeller Sump Pumps
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