Sewer Systems

Grinder Pumps

About the E/One Extreme Series Grinder Pump

Sewage grinder pumps collect all of the wastewater from the home, grind up solids, and send the wastewater to the sewer line or treatment system.

The grinder pump is automatically activated and typically runs for very short periods several times per day. Electrical consumption of the grinder pump is low — a household that uses 250 gallons of water per day should use between 6 kwhr and 23 kwhr per month to run the pump. (Actual water and power usage will vary depending on the system pressure.)

E/One grinder pumps do not require preventive maintenance and boast 10 years average mean time between service calls. If service is required, the unique, one-piece core eliminates the need for in-field service — the pump core can be quickly pulled out and replaced, meaning minimal maintenance costs and inconvenience for the homeowner.

All E/One grinder pump stations currently offered use the Extreme Series grinder pump. 

Operational Information

Motor: 1 HP, 1725 rpm, high torque, capacitor start, thermally protected, 240 or 120 volt, 60 hertz, 1 phase

15 gpm at 0 psig
11 gpm at 40 psig
7.8 gpm at 80 psig

Electrical Information

For a standard 240V single-phase installation, a dedicated 30A breaker is required, with #10 wire, to the E/One panel. You need to bring L1, L2, N and Gnd.

If only 208V power is available, a buck boost transformer is required to boost 208V to 240V. The E/One pump requires a minimum of 216V to start and run reliably. 


The E/One SPD Pump vs Centrifugal Pumps

cutter wheel eone    cutter wheel other




E/One’s low speed, high torque, 133 mm wheel has an inlet velocity of  1.09 m./sec, which slowly introduces the debris into the cutter and is less likely to jam, bind, or suffocate.

The paddles on E/One’s cutter wheel stir the waste water, which helps keep the tank clean and prevents sediment build up.

E/One’s grinder does not require sharpness to function properly and is a true macerator as opposed to a slicer. Slicers do not function properly once blade edges are dulled.



Small 63.5 mm diameter cutter wheels have a much higher inlet velocity of 6.94 mm./sec, which leads to more jamming, binding, and suffocating.

Higher velocity wheels wear faster and produce less stirring, leading to more retained sediment in the tank.


Unique Progressing Cavity Design

 unique progressing cavity design

Hydraulic Curvessystem performance mega curve

E/One's Sewer systems business has achieved ISO 9001:2015 certification.