Zoeller Sump Pump Review By Model At Pumps Selection

Discover For Yourself The Difference Between Models

M53, M57, M98. M137, M268, 507-0005, 508-0005 and Other Models

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The Zoeller Pump Difference
Understanding the differences between Zoeller pump models will help you select the -perfect pump for your water pumping needs. For your convenience we compare both the models obvious differences as well as their features. Learn before you buy so you purchase the best sump pump or water pump for your situation.
 
The Zoeller sump pump review by model will help you discover for yourself the differences between models including M53, M57, M63, M98. M137, M268, M264, 507-0005, 508-0005 and other models so you can make the best pumps selection for your water pumping needs. We provide both a summary of model differences and a detail of model differences by feature.
 
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Zoeller Sump Pump Model Comparison

THE SUBMERSIBLE PRIMARY ZOELLER SUMP PUMP REVIEW BY COMPARISON

The most popular submersible primary Zoeller models M53, M57, M98 and M137 are compared for similarities and differences. They are similar in that M53, M57, M98 and M137 all have cast iron housing, a non-clogging impeller without the need of a screen to stop debris from getting clogged in the impeller, stainless steel screws, pump handle, guard, arm and seal assembly, puncture proof float, and two-pole mechanical float-switch.
 
Their differences are a little more subtle. Because Zoeller groups their pumps by series we will identify differences in the series and among the series.
 
M53 vs M57
M53 vs M57 difference is M53 base is engineered plastic while M57 has a cast-iron base. The M53 impeller is glass-filled with metal insert while the M57 impeller is cast iron. M53 vs-M57 reveal both have cast iron pump housing, are one-third horse power and their performance flow rate (PFR) is 43 gpm at ten feet. The cost difference is only around $20.
 
M53 vs M63
M53 vs M63 both have cast-iron housing and non-clogging impeller. They are one-third horse power and their performance flow rate (PFR) is 43 gpm at ten feet. The difference between M53 and M63 is M53 Base is engineered plastic, impeller is glass-filled metal, horse-power is one-third HP. M63 base, impeller and shaft are cast iron. The power cord for the M53 is nin feet; the M63 power cord is ten feet; the M53 has a three year warranty whereas the M63 has the longest warranty of any Zoeller pump - five years (very impressive), impeller is engineered plastic, horse power is one-third HP. The cost difference is only around $50 with M63 costing the most.
 
M53 vs M98
M53 vs M98 both have cast-iron housing and non-clogging impeller. The difference between M53 and M98 is M53 Base is engineered plastic, impeller is glass-filled metal, horse-power is one-third HP. M98 base is cast iron, impeller is engineered plastic, horse power is one-half HP. The flow rate for M53 is 43 gpm while M98 performance by flow rate is 72 gpm. The cost difference is around $55.
 
M57 vs M98
M57 vs M98 have cast iron housing and base. The difference is M57 impeller is cast iron; horse power is 1/3 hp, performance-flow-rate is 43 gpm at 10 foot lift height. M98 impeller is engineered plastic, horse-power is 1/2 hp, performance-flow-rate is 72 gpm at 10 foot lift height. The cost difference is around $35.
 
M57 vs M63
M57 vs M63 have cast iron housing, base, impeller and shaft. They both pump 43 gpm at 10 foot lift height; the float ON and OFF point is the same. The basic difference is the power cord for the M57 is nine feet; whereas the power cord on the M63 is ten feet. Also the M53 has a viton outer switch boot. It can be seen in the dark. In addition the warranty is three years for the M57 and five years for the M63. The cost difference is around $20.
 
M57 vs M98 vs M137
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.
 
N53 vs N98
Similaries between N53 vs N98 is the following: they have no float switch; they have cast iron housing and non-clogging impeller. The difference between N53 and N98 is N53 base is engineered plastic, impeller is glass-filled metal, horse-power is one-third HP. N98 base is cast iron, impeller is engineered plastic, horse-power is one-half HP. The motor for N53 supports a pumping flow rate of 43 gpm while the N98 motor supports a flow rate of 72 gpm. A float switch must be purchased for both of these pumps. We recommended the fail proof float switch for these two pumps - the HC6000. We installed the HC6000 in 2011; we live in a high water table area so our pump runs a lot even on sunny days. This switch has not failed yet. Here are the details about this highly rated float switch.
 
M95 vs M98
M95 vs M98 differences are the pumpiing performance, shut off head, warranty and switch type. The M95 pumps 66 gpm at 10 feet lift height where as the M98 pumps 61 gpm at the same height. The shut-off height the M95 is twenty-six feet whereas the shut-off height for the M98 is twenty-three feet. The warranty for the M95 is five years whereas the warranty for the M98 is three years. Lastly the M95 has the special Viton outer switch boot with illuminates.
 
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THE BATTERY BACKUP PUMP REVIEW BY COMPARISON

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 Model 585 is a pedestal style backup and the motor sits above the pit and must not be submersed in water.
 
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 while 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.
 
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 accomodates 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.
 
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THE ZOELLER WATER POWERED PUMP REVIEW BY COMPARISON

Zoeller has one water powered sump pump. The 503-0005 Homeguard Max. is not a primary pump but is to be used as a backup system.
 
The pumping performance of the 503-0005 is dependant upon the city water pressure. If the pressure coming into the home is fourty PSI (pounds per square inch), seven hundred sixty-two gallons of pit water can be pumped per hour; If the municipal water pressure is sixty psi one thousand  one-hundred fourty gallons can be pumped per hour. If the city water pressure is eighty psi, the pumping performance is one thousand two hundred gph.
 
For every gallon of city water used, two gallons of pit water are removed. Home well system water cannot be used. The 503-0005 will fit in an eighteen inch diameter pit with a primary pump.
 
Homeowners who prefer not to rely on battery backup power because their backup system runs for long periods of time, find the Homeguard Max to be a great solution. No electricity or battery is required. The 503-0005 relies solely on the availability of city water and its dependable pressure.
 
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THE ZOELLER COMBINATION SUMP PUMPS REVIEW BY COMPARISON

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. Measuing the diameter of the pit is easy. Take a yardstick and lay it across the open pit, write down the number of inches. Measuing the amount of water entering the pit during a rainstorm is more challenging. See the steps for determining the size of pump needed.
 
PROPAK MODEL WITH PRIMARY AND BACKUP
 
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.
 
PROPAK MODEL WITH PUMPING PERFORMANCE
 
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.
 
PROPAK MODEL DIMENSIONS
 
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).
 
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THE ZOELLER SEWAGE PUMPS REVIEW BY COMPARISON

M268 vs M264 Sewage Pump Review by Comparison
M264 vs M268 difference is M268 has cast iron base while M264 base is engineered plastic. M264 is 4/10 horse power; M268 is one-half horse power. 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 Sewage Pump Review by Comparison
M267 vs M268 are identical except the M268 weighs a little over fifty pounds and the M267 weighs fourty-sven and on-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, have a vortex impeller made of engineered plastic with a metal insert, have a ten foot power cord, pump 128 gallons per minute, have a shut off height of 21.5 feet. have a disharge size of 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 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 custonized 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 maintenace, this is a great idea.
 
E270 and M280 Series
The E270 and M280 Series Sewage pumps come with a lot of power - one horse power. The M270 ASeries has a maximum head shut off hjeight 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 engineeered plastic impeller. Tlow rate for the E270 series is 132 gallons per minute whereas the M280 series has a flow rate of 179 gpm. Though these pump series a very similar it is important to note the cord length for the M280 series is ten feet whereas the cord length for the E270 series is twenty feet.
 
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Zoeller Pump Detailed Features Review By Comparison
 
HORSE POWER AND PERFORMANCE (GPH) REVIEW BY COMPARISON
 
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-half (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.
 
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 ft lift height.
 
The 1/2 HP Models include M76, M95, M98, M137 , N137 (Non-Automatic), M139, and N139 (Non-Automatic).
The pumping performance of 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 ft 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 ft 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 ft height.
 
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CONSTRUCTION MATERIAL HOUSING, BASE, IMPELLER REVIEW BY COMPARISON
 
Stainless Steel
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 polypropolene
Glass-filled polypropolene 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 polypropolene.
 
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 engineeered thermoplasic. 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.
 
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FLOAT SWITCH REVIEW BY COMPARISON
Tethered
Advantages of tethered float
The homeowner has some flexibility in determining the ON and OFF point of the motor by lessening some of the slack of the tether.
 
Disadvantages of tethered float
The tethered float requires the widest pit diameter to operate. The tether and float can tangle and get hung up most easily.
 
How 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 49-0005, the Water Ridd'r III, has a tethered float switch and requires 12 in. diameter-pit.
 
Two-pole float operated mechancial switch
Advantages of two-pole vertical
The two-pole vertical float requires less pit diameter, has a protective guard that protrudes from the switch box to prevent the float from getting caught, the float is held securely in place, the float is made of solid polypropylene so puncturing will not cause it to fail.
 
Disadvantages of two-pole vertical
The ON and OFF point of the pump cannot be altered. It is important to remember that the switches are expected to last three to five years depending upon the frequency of pumping. It is best to have a replacement switch on hand. It is easy and cheap to replace the switch.
 
How two-poled vertical float switch works

The operation of the two-pole float-switch is simple. As the water rises in the pit, the float rises every 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.

 
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SOLIDS HANDLING REVIEW BY COMPARISON
 
Vortex Impeller - Non clogging
Advantages of vortex impeller
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.
 
3/8 in. solids-handling
Models 49-0005, M76 can handle up to 3/8 in. solids.
 
1/2 in. solids-handling
Models M53, M55, N55, M57, BN57, M59, N59, M63, M95 and M98 can handle up to 1/2 in. solids.
 
5/8 in. solids-handling
Models 137, N137, M139, and N139 can handle up to 5/8 in. solids.
 
2 in. solids-handling
Models M264 and M267 can handle up to 2 inch solids.
 
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PUMP ON POINT AND OFF POINT REVIEW BY COMPARISON
 
Preset ON and OFF Points
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 independant 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
This means only 3 3/8 inches of water is removed during one pumpincycle 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 in. diameter-pit.
 
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POWER CORD LENGTH REVIEW BY COMPARISON
 
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 braker to trip because of over load. In addition, a sump pump should not be plugged into an extension cord.
 
Nine Foot Power Cord
Models 49-0005, M53, M55, M57, M59, and M76 have a nine ft power cord.
 
Ten Foot Power Cord
Model M63 has a ten ft power cord with an LED lighted plug end which can be easily seen.
 
Twelve Foot Power Cord
Models M137 and M138 have a ten ft power cord.
 
Fifteen Foot Power Cord
Models M95, M98, N137, and N139 have a fifteen foot power cord. 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, N59 have a sixteen foot power cord.
 
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AMPS (AMPERAGE) REVIEW BY COMPARISON
 
Ampherage determines how much electricity is used. Ampherage is converted to kilowatt hours to determine how much it costs to run a Zoeller Sump Pump.
 
AMPs Used Per Model
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, N139 use 10.7 amps.
 
 
SHUT OFF HEAD TOTAL OF HEIGHT AND LENGTH AT WHICH PUMP WILL NO LONGER PUMP
 
The shut off head height for the M53, M55, M57, 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 and for the M95 it is twenty-six feet. For M75, M76 is sut-off-height is twenty-five feet. For M49, M72, M73 the shut-off-height is eighteen feet.
 
 
THE DIMENSIONS OF THE MODELS IS DIFFERENT
 
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:
 
WARRANTY REVIEW BY COMPARISON
 
All Zoeller models have a three year warranty except for M72 and M76 which have a one year warranty because the housing is made of engineered plastic, and the M63 and M95 which have a five year warranty. 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. If the float-switch is replaced every three to five years depending upon frequency of use, they will continue to pump for years.
 
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Zoeller Pump Reviews

 
ZOELLER PUMP CONSUMER REVIEWS
 
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.
 
 
 

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.
 

The Zoeller Sump Pump Is Different Inside

  * Pump housing is made of cast iron not plastic which overheats.
  * 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. Many manufacturers purchase canned motors from another company 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 continiuous 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 puncturer.
  Clearance is found between where the impeller spins and where the water is sucked in. This prevents clogging.
 
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What Makes Zoeller Unique?
  All Zoeller 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'.
  Performance is higher than other manufacturers with same horse-power
  Zoeller is the oldest independently owned U.S. pump manufacturer (1939).
  Full line of pump types are available: primary submersible, battery backup, water powered, combination (primary + backup) and pedestal, laundry, seweage.
  Replacement parts are available including float switches.
  Accessories are available including check valves, basins, alarms.
 
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   (Click PARTS & ACCESSORIES to see Specific Parts or Accessories; Scroll down the page to see all.)
 
 

Zoeller Parts

Owning a cast iron Zoeller pump makes it possible to focus only on the need to replace small inexpensive parts.
 
 
VARIABLE LEVEL FLOAT SWITCH (VLFS)
 
Advantages
The switch is easy to install and replace since it is not solid state to the pump. It is separate and installed to the discharge piping system.
 
The homeowner can determine the height of the float-switch and thus the ON and OFF point for the pump.
 
If the switch for this float-switch is piggyback, it means the pump is plugged into the plug on the float-switch and the float-switch is plugged into the electrical wall outlet. If the float switch should fail the pump can be plugged directly into the wall outlet. This is great for emergency situations; however, the pump must be monitored because it will keep running until unplogged because there would be no operating float.
 
Disadvantages
Since the variable level float-switch is a tether with a float at the end, it still requires an eighteen in. diameter-pit.
 
The tether float can become tangled and caught because the float swings up and out when the water rises.
 
Variable Level Float Switches Available for Non-Automatic Sump Pumps
Zoeller manufacturers variable float switches which can be used with the non-automatic sump pumps.
 
The floats are tethered, omni-directional which means there is no UP side and use 12 to 15 amps duriing operation. They are also piggyback which means the pump motor cord is plugged into the back of the float-switch and the float-switch is plugged into the wall electrical socket. If the switch fails the pump cord can be plugged directly into the wall socket; however the pump must be monitored because it will not stop pumping until the cord is pulled from the plugin.
 
The floats are constucted of durable molded material encasing. When the float is up the circuit is closed and the pump will run. When the float is down, the circuit is open and the pump will not run.
 
The piggyback float-switch comes in two styles - single and double.
 
The single piggyback includes one float-switch.
Item numbers include 10-0055 (10 foot cord); 10-0034 (15 foot chord); 10-0063 (20 foot chord). The minimum pumping range is six inches. The maximum pumping range is thirty-six inches.
 
The double piggyback includes two float-switches.
Item number is 10-1094 (15 foot chord). The minimum pumping range is three inches. The maximum pumping range is fourty-eight inches.
 
Single Piggyback Variable Float Switch
Item No. 10-0055 - Switch-Mate uses 12 amps and has a 10 foot cord. The lowest the float can be attached to the discharge piping system is six inches from the pit bottom and the highest it can be attached is thirty-six inches. This float-switch can be used with any of the non-automatic pumps listed on this page.
 
Item No. 10-0034 - Switch-Mate uses 13 amps and has a 15 foot cord. When attached to the discharge piping system, the lowest this float can be attached is six inches from the pit bottom and the highest it can be attached is thirty-six inches. It can be used with any of the non-automatic pumps listed on this page.
 
Item No. 10-0063 -uses 13 amps and has a 20 foot cord. The lowest this float can be attached to the discharge system is six inches from the pit bottom and the highest it can be attached is thirty-six inches. It can be used with any of the non-automatic pumps listed on this page including the 1/2 HP sump pumps.
 
Double Piggyback Variable Level Float Switch
Item No. 10-1964 - uses 15 amps and has a 15 foot cord. This product has two float switches. The lowest the float-switch can be attached to the discharge piping system is six inches from the pit bottom and the highest it can be attached is thirty-six inches. This float-switch can be used with any of the non-automatic pumps listed on this page.
 
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Replacement Parts Reviews By Comparison
 
Replacement Parts
 
Fortunately for the homeowner Zoeller manufacturers parts for their pumps. Since they make their own replacement parts the homeowner can be sure the parts will fit perfectly and are of high quality.
 
SWITCH REPLACEMENT FOR ZOELLER 50 AND 90 SERIES PUMPS.
The part number is 004892. The switch will fit all Zoeller sump pumps in the 50 and 90 Series. The part will fit perfectly because it is manufactured by Zoeller. The switch is easy to replace. See the steps with pictures for switch replacement
 
GASKET FITTING BETWEEN THE SWITCH CASE AND HOUSING TOP. FITS MODELS ER 50 AND 90 SERIES PUMPS.
The part number is 034046. The gasekt will fit all Zoeller sump pumps in the 50 and 90 Series. If the pump still turns off and on but makes a funny girggly sound betfore it shuts off, the gasket may need replacing. Replacement is extrememly easy. Loosen the four screws, remove the gasket and replace it; tighten the screww for the cap assembly and you are done. The part will fit perfectly because it is manufactured by Zoeller.
 
ASSEMBLY ARM AND SEAL FOR THE ZOELLER 50 AND 90 SERIES PUMPS
The part number is 004704. The assempbly arm and seal will fit all Zoeller sump pumps in the 50 and 90 Series. The part will fit perfectly because it is manufactured by Zoeller.
 
GASKET CASE/COVER FOR THE ZOELLER 50 AND 90 SERIES PUMPS
The part number is 034046. The gasket case/cover will fit the 50 and 90 Series. If you do not want to The part will fit perfectly because it is manufactured by Zoeller.
 
IMPELLER FOR THE ZOELLER M53, M55, M98
The part number is 003644. This impeller is engineered plastic which is the material used for the M53, M55 and M98 as well as their Non Automatic versions N53, N55, N98.
 
SOLID POLYPROPYLENE FLOAT FOR M50, M98 AND M137 SERIES
The part number is 034019. It is highly unlikely you will ever need to replace this part because it is solid buoyant polypropylene. Even if the float is punctuered it will not become filled with water. The float is for the M50 series, M63, M98 amd M137.
 
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Accessories Reviews By Comparison
 
CHECK VALVES
Zoeller check valves are best sellers, are rated highly by consumers, and are easy to buy online.
 
Zoeller has many check valve styles ranging from those that slip on both ends of the discharge pipe and those that are glued on. Sizes also vary from 1 1/4 inch to 2 inches.
 
As for the water thumping sound, Zoeller manufactures both the standard and the quiet check valve.
 
The most popular quiet check valves are model no 30-0040, 30-0041, 30-0042. The most popular traditional flapper (noiser) models include 30-0181, 30-0151, 30-0021.
 
Zoeller check valves are very reasonably priced ranging from $9 to $30.
 
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BASINS
Zoeller basins sold online come in the following size: 18 inches x 22 inches with volume of 22 gallons. They are made of polyethylene, seamless and corrosion-resistant.
 
The model 31-0444 comes with no Hub or Hole. This allows the installer to made the holes at the height to fit the drain tile system.
 
The model 31-0251 has an inlet hole without a hub.
 
The model 31-0249 is a basin and cover. It comes ready for Radon mitigation. The basin is 18 inches in diameter, 22 inches in height and has a capacity of 18 gallons. It is made of polyethylene without seams and corrosion resistant and has an inlet hole. The cover seals to the basin. The cover has a 1 1/2 inch outlet and a 3 inch vent.
 
BASIN COVER
Zoeller basin covers sold online are made of polyethylene and are 18 inches in diameter. They will fit an 18 inch diameter basin. The necessary sealing hardware and flanges are included. They come with two different configurations.
 
The item no 17-0135 has a 3 inch vent and a 13 inch slot opening.
 
The item no 17-0294 has a 1 1/2 inch discharge, 3 inch vent and cord grommet.
 
BASIN EXTENSION
The item no 31-1473 is an extension for a sump basin. The extension is 12 inches in height and fits an 18 inch diameter sump pit. In effect the extension makes the sump basin deeper at the top.
 
WATER ALARMS
The two water alert series manufactured by Zoeller are the A-Pak and the Aquanot Flood Alert.
 
The Aquanot Flood Alert Series operate on three AAA batteries. The sensor contacts are stainless steel. No adjustments are required when installed. They are made of solid-state electronic components, have a five foot lead wire, and have AC power adapter capability (Class 2 transformer, Type B Plug).
 
The Aquanot Flood Alerts send a warning by a loud intermitten horn of 103 decibels when the sensors are contacted by water and when the alarm batteries are low.
The alarm can be silenced using the on/off silence switch.
The model number is 10-0763.
 
The A-Pak Alarm System can operate indoors or outdoors. It has terminal connections for a pump and float-switch. The horn (rated at 86 decibles) and light will operate when there is a high water condition. The alarm can be tested or reset using the auto reset. The standard float-switch cord length is fifteen feel with a six foot power cord. It has a 9 V battery-backup feature. The model number is 10-0623.
 
AUTO DIALER
 
The auto dialer is a single channel voice autodialer. It uses voice chip technology and not tapes. It can be used with any device that can provide a normally open/closed contact including telephone (voice tone or pulse not digital), most cell phones, and pages. It can be programmed to store up to four number to dial. It dials each contact number up to four times. It provides a sixteen second pre-recorded mesage; you record your own personal messages. An internal 9V battery-backup is included. The model number is 10-2616
 
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   (Click INSTALLATION to see Installation Help; Scroll down the page to see all.)
 

How to Install Zoeller Sump Pump

Zoeller Pumps are easy to install. Check the Owners Manual, follow the steps below and watch the video.
 

Steps to Install Zoeller Sump Pump

 

Step 1. Screw adapter into pump discharge port

STEP 1

Find the threaded 1 1/2 inch male adapter and screw it into the pump discharge port. Tighten it up.

Step 2. Prime and Glue PVC piece. Place piece in pump discharge port.

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. Attach the No-Hub at the top of the PVC piece.

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.

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 a check valve is installed.

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 everytime a new pump is installed. In fact, a quiet check valve is a great solution to prevent water knocking.

Step 6. Connect the pump discharge piping to existing discharge piping system.

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.

 
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Watch How A Plumber Installs a Zoeller Sump Pump
 
 
 

HOW TO DETERMINE SUMP PUMP SIZE NEEDED

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. Meausre 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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SIX 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 maintenace 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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