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.
(Click MODEL DIFFERENCES to see Specific Model Comparison; Scroll down the page to see all.)
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.
M63 has one big upgrade, the float switch. The float switch is both electronic and mechanical; therefore it will last much longer; hence the five year warranty. In addition another switch boot, known as a Viton Boot, has been added in the switch case to provide additional protection against moisture entering the switch area and causing a short.
Other noteable differences are the 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 nine 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 M63 cord has a plug that lights when power is flowing through it. 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.
The biggest difference between M57 and M63 is the float switch mechanism. The M57 switch is compeltely mechanical while the M63 switch is both electronic and mechanical. This means the M63 switch will last longer. Plus the M63 Viton Boot which encases the switch will provide additional protection against moisture which causes an electrical short leading to failure. In addition the M63 plug on the power cord glows when electricity is flowing through it. Because of the switch upgrades the warranty for the M63 is five years while the warranty for M57 is three years. 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 which provides additional protection against moisture entering the switch area and the cords plug illuminates when power is flowing through it.
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.
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.
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.
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.
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).
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.
(Click DETAILED FEATURES COMPARISON to see Specific Featues Comparison; Scroll down the page to see all.)
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 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.
CONSTRUCTION MATERIAL HOUSING, BASE, IMPELLER REVIEW BY COMPARISON
All Zoeller Pump screws, guard and handle are stainless steel. Stainless steel will not rust and has strength.
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 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 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 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.
FLOAT SWITCH REVIEW BY COMPARISON
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.
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.
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.
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.