This 3/4 HP Sump Pump Review by Comparison For Submersibles at Pumps Selection emphasizes all three-fourth horse power sump pumps are not the same. Differences surface in pumping capability, housing, float switch types, Amp usage, and availability of replacement parts. Becoming an educated homeowner is key to installing the best sump pump for your water pumping needs.
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Quick Info About The 3/4 HP Sump Pump
- 3/4 HP sump pumps are heavy duty sump pumps designed to move a lot of water.
- Installing a 3/4 HP sump pump in a small pit will not work. The pit should be a minimum of 18 inches in diameter and 30 inches deep.
- Installing a 3/4 HP sump pump is smart only if such a high GPM is necessary because pumping small amounts of water from the pit will cause motor short cycle and undo wear on the motor.
- GPM and GPH vary widely therefore it is necessary to check a pump models specifications. GPH for 3/4 HP sump pumps ranges from 1,740 GPH at a 10 foot vertical height to 3,200 GPH.
- Pump housing material used includes: cast iron, cast steel, stainless steel, and zinc. Cast iron is heavier, most durable and dissipates heat well.
- Vortex impellers handle pit debris and small pebbles. A sump pump without a vortex impeller relies on a bottom screen which requires periodic cleaning or top suction which does not remove debris and pebbles from the pit.
- Tether float switches take the most pit room and tangle easily in the pit. Vertical float switches take less room and have a guard to protect the float from getting caught in the pit.
- 2-pole snap action float switches are not affected by water minerals and chemicals like the magnetic draw vertical float switch.
- Installing a larger horse power sump pump is not always better. Too much horse power with not enough water to pump per cycle causes pump short cycling and decreases a motors longevity.
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Three-fourth HP Sump Pump pumping performance ranges from 67 GPM or 4,020 GPH to 80 GPM or 4,800 GPH.
The pump with the highest GPH is Everbilt model HDS75 with 4,800 GPH at a 10 foot vertical height. The Zoeller Pump model 1099-000 is a very close second at 4743 GPH.
The 3/4 HP sump pumps with the lowest GPH are Flotec models E75VLT and FPSS5700A, and Liberty Pump models 290, 293 and 297 with 4,020 GPH at a 10 foot vertical height.
What is Sump Pump Pumping Performance?
Sump Pump Pumping performance is measuring how much water a sump pump can remove from a pit in a minute or hour at a specified height. It is measured by gallons pumped per minute (GPM) or gallons pumped per hour (GPH) at a published vertical head height. A models pumping performance varies by brand and model even among same horse power motors; however each model does have a pump performance curve or chart that states what to expect. The performance curve GPM and GPH helps the home owner to compare their existing discharge pipe system vertical height, the number of elbows and the pit diameter to the published performance chart.
Three-Fourth GPH At 10 Foot Vertical Height By Pump Model
3/4 HP Model GPH by most to least.
- Everbilt model HDS75 GPH @ 10 feet Vertical Height is 4800 GPH..
- Wayne Water Systems model CDU980E GPH @ 10 feet Vertical Height is 4600 GPH.
1) Measure the vertical height of the discharge pipe system from the pump discharge port to its highest vertical point is crucial.
2) Measure the diameter of the pit so it can be determined how many gallons are pumped per pumping cycle. One inch of water pumped in an eighteen inch pit equals one gallon of water. One inch of water in a twenty-four inch diameter pit equals two gallons of water.
3) Find the distance between the float switch ON OFF height on the pump manual. Typically the distance between the vertical float switch ON OFF point is five inches therefore five gallons of water would be pumped from an eighteen inch pit per pumping cycle. If the sump pump ran five times a minute, twenty-five gallons of water would be pumped per minute if the pump ran continuously.
4) The pump performance chart can then be used with the measured vertical head height and pit volume of water pumped per minute or hour during a heavy rainstorm to indicate if the model of interest meets your water pumping needs.
. Comparing these float switch types reveals the following differences.
- The tether float requires the greatest pit diameter because the float swings out as the water rises.
- The magnetic draw vertical float and the diaphragm require the least amount of space.
- The 2-pole snap action float is most protected against pit entanglement with its protective float guard.
- The tether float gets tangled most easily because the float swings out as the water rises in the pit. The float ON OFF height is most customizable.
- The 2-pole snap action vertical float is least customizable.
- Water minerals cause magnetic draw vertical float switch failure most frequently.
- Small pebbles lodge and cause diaphragm failure.
- The 2-pole snap action float switch is not affected by water contaminates and tends to last the longest before replacement is necessary.
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Float Switch Types By 3/4 HP Sump Pump Models
- The snap-action vertical float switch is used by the Wayne model CDU980E and the Everbilt model HDS75.
- The magnetic-draw vertical float switch is used by the Zoeller model 1099-001, the Flotec models E75VLT,FPZT7450, the Superior Pump model 92751, and the Liberty Pump model 297.
- The tether float switch is used by Flotec model FPSS5700A, and Liberty Pump model 293.
There are several types of housing material used for three-fourth horse power sump pumps: cast iron, stainless steel, and zinc. Thermoplastic is not used because too much heat is genearwted during continuous pumping and thermoplastic traps heat.
Housing material makes a difference because it affects the pumps weight, durability and ability to dissipate motor heat during heavy continuous pumping.
For heavy duty pumping as demanded by a three-fourth HP sump pump, Cast iron is the best material for durability, weight and heat dissipation.
-Cast iron does rust, epoxy coating is used to retard corrosion. An all cast iron pump will not move during rigorous pumping which means the float will not get caught on the pit wall.
-Stainless steel heats up more quickly than cast iron but cools down more quickly. Since stainless steel is not as heavy as cast iron, a cast iron base is used to add weight to stainless steel housing.
-Stainless steel, aluminum and zinc do not rust however they are not as heavy thus a cast iron base is often used to add weight.
-Zinc heats up faster than stainless steel and cast iron, is light weight and not as durable as cast iron.
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Housing Material Used By 3/4 HP Sump Pump Models
- Cast iron pump housing is used for Zoeller model 1099-0001, Flotec model E75VLT, Liberty Pump models 290, 293 and 297, and Everbilt HDS75.
- Stainless Steel housing is used for Wayne model CDU980E, Superior Pump model 92751, and Flotec model FPSS5400A.
There are two ways the three-fourth horse power sump pump is designed to handle debris and solids: top suction and no debris handling and a vortex impeller which allows small spherical debris to flow through the pump without clogging it.
- Wayne Water System uses top suction so there is no screen and handling of debris and small pebbles so they remain in the pit.
- Brands like Zoeller, Liberty Pumps, Superior, and Flotec use a vortex impeller which allows small debris to flow through the pump.
- It is best to choose a solids handling design based on the degree of debris and solids collecting in the pit.
Pit diameter size required is based on the width of the sump pump and its float type.
Three-fourth horse power pumps are larger so required a 12 inch pit. Those with a tether float require the most pit diameter, 18 inches, because the float is free floating up, out and in.
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Wattage Amps Usage
Three-fourth HP sump pumps use a larger motor and thus use more electricity.
- The Amps used by 3/4 HP sump pumps ranges from 12 Amps to 6 Amps.
- Flotec model FPSS5700A uses the most electricity at 12 Amps or 1380 watts compared to the Flotec model.FPZT7450 which uses 6 Amps or 690 Amps.
- Sump pump electricity usage by measured in Amps. Converting Amps to watts is easy. Multiply the published sump pump Amps by the voltage which is 115V for 3/4 HP sump pumps. So Zoeller model 1099-0001 uses 9 Amps or 1,035 watts.
Amps Used By 3/4 HP Sump Pump Models
Model AMP usage is listed by least amount used to greatest amount.
- Flotec model.FPZT7450 uses 6 Amps.
- Flotec model E75VLT uses 7 Amps.
- Superior model 92751 uses 7.5 Amps.
- Zoeller model 1099-0001 uses 9 Amps.
- Wayne CDU980E uses 10 Amps.
- Liberty Pump models 290, 293 and 297 use 10.4 Amps.
Three-fourth horse power pumps warranty ranges from 3 years to 5 years. Zoeller, Liberty Pump, Superior, and Everbilt off a 3 year warranty. Flotec models E75VLT and FPSS5700A and Wayne CDU980E offer a 5 year warranty.
Cost
Three-fourth horse power sump pumps have a wide price variance: From $150 to over $400.
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The most budget friendly 3/4 HP sump pump is Wayne model CDU980E. A close second is Superior Pump model 92751. There is no evidence showing these sump pumps are inferior. In fact the Wayne model CDU980E has high customer review ratings: 4.7 out of 5 stars.
Most sump pump manufacturers do not test each sump pump before it is shipped.
- Zoeller and Liberty Pumps test each pump before shipment.
- Other brands test sump pumps by lots or models to ensure quality control. A warranty is used to handle sump pump failure during initial installation or within the specified warranty period.
Maintenance Requirements For Three-Fourth Horse Power Sump Pumps
Maintenance requirements for three-fourth horse power sump pumps includes cleaning the air lock hole, and replacing the float switch.
The Air Lock Hole
Cleaning air lock holes is unnecessary in a pit without debris. If cleaning is necessary the air lock hole is found in the base of the sump pump or in the discharge pipe close to the pump port. Using a thin sturdy wire works well as a cleaning tool.
The air lock hole is found either at the base of the pump or on the discharge pipe below the top of the pit. Avoiding an air lock hole to eliminate periodic cleaning is not a good idea because an air pocket can cause the pump to run and pump no water.
Eventually Float Switches Fail And Need Replacement
Buying a sump pump with a readily available float switch is smart.
- Wayne, Zoeller, Flotec and Everbilt replacement float switches are readily available online for a DIY homeowner.
The pump housing will outlast the float switch. Rather than discard the pump just because the switch fails, is it smart to install a replacement float switch.
- Buying a replacement before switch failure is a smart thing to do.
A 3/4 HP sump pump pump is actually more than enough for most sump pump owners. To operate efficiently, a 3/4 HP sump pump pit should be 24 inches in diameter and 30 inches deep. If your existing sump pump does not run continuously and water entering the pit through the inlet drainage pipe does not cause the pit water level to rise above it, a 3/4 HP sump pump is too much for the pumping demand. The lowest GPM rate for a 3/4 HP sump pump is 62 GPM. Too much HP causes the motor to run short cycles and wear it out faster.
What is the best horsepower for a sump pump?
A 1/3 HP sump pump is most common for a 1,200 square foot house. A ½ HP sump pump is good for houses located in a high water table area that receives a lot of water during heavy rainstorms and runs continuously for an extended period of time. However, the best sump pump horse power for your house depends upon the area foot print of your house, the height of the water table and elevation of the house compared to houses around it, the volume of water entering the pit during a heavy rainstorm and for how long.
What is the flow rate of a 3 4 sump pump?
The flow rate of a 3/4 HP sump pump ranges between 62 to 80 gallons per minute or 3,720 to 4,800 gallons per hour. That is a lot of water and means that the sump pump is running continuously for extended periods of time.
Can my sump pump be too powerful?
Yes, your sump pump can be too powerful. Quick short runs, known as short cycling, cause unnecessary wear on the motor. Observe your current sump pump during a heavy rainstorm. Determine if the pump is keeping up with the water coming into the pit. If the water is rising only a few inches from the pit top, the next larger horse power sump pump is a good choice.
2) Disengage the check valve so the discharge pipe is free so the sump pump can be removed from the pit; be prepared to catch water from the dangling discharge pipe
3) Remove old sump pump from the pit.
4) Unscrew the discharge pipe from the old pump discharge port.
5) Screw the piping from Step #4 into the new sump pump discharge port.
6) Lower the new sump pump into the pit so it sits solidly on the bottom of the pit.
7) Connect the discharge pipe from the new sump pump to the dangling discharge pipe.
The following video shows how easy it is to install your own sump pump. This is how we learned and no longer depend upon a plumber to do the job. Installing your own sump pump saves money and offers schedule freedom.
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Sump Pump HP 3/4 HP Review by Comparison
