W-Series | WH231 & WR231 ("SQUAT") Grinder Pump Station
Featuring the E/One Extreme grinder pump, the WH231/WR231 offers a high level of reliability and ruggedness. The lower portion of the tank has a smaller diameter, tapered down to a dish-shaped bottom. These design features reduce the retained volume and promote scouring, which will minimize odor and corrosiveness.
Drawings & Installation Instructions
Recommended Alarm Panel
Additional alarm panel options are available.
E/One's WH231/WR231 grinder pump station consists of a pump inside an open wetwell tank. The grinder pump, motor controls and level-sensing are integrated into a compact unit, easily removable for service.
- The WH231 is the “hardwired,” or “wired,” model where a cable connects the motor controls to the level controls through watertight penetrations.
- The WR231 is the “radio frequency identification” (RFID), or “wireless,” model that uses wireless technology to communicate between the level controls and the motor controls.
Solids are ground into fine particles that pass easily through the pump, check valve and small-diameter pipe lines — even objects that are not normally found in sewage, such as plastic, rubber, fiber, wood, etc. The 1-1/4" discharge connection can be adapted to any piping materials that meet local code requirements. The internal check valve assembly, located in the grinder pump, is custom designed for non-clog, trouble-free operation.
The tank is made of tough corrosion-resistant polyethylene. Designed specifically for low pressure sewer applications, the optimum tank capacity of 237 gallons provides ample storage. A single WH231/WR231 can accommodate flows of up to 850 gallons per day.
Units are available for indoor and outdoor installations. Outdoor units accommodate a wide range of depths. E/One requires the installation of its stainless steel UNI-LATERAL to prevent backflow from the sewer system from entering the grinder pump station.
About the E/One Grinder Pump
The grinder pump is automatically activated and runs for very short periods. Electrical consumption of the grinder pump is low — a household that uses 250 gallons of water per day should use less than 10 kwhr per month to run the pump. (Actual water and power usage will vary.)
E/One grinder pumps do not require preventive maintenance and boast an average of eight to 10 years between service calls. If service is required, the unique, one-piece core eliminates the need for in-field troubleshooting and servicing — the pump core can be quickly pulled out and replaced, meaning minimal maintenance costs and inconvenience for the homeowner.
Motor: 1 HP, 1725 rpm, high torque, capacitor start, thermally protected, 240 or 120 volt, 60 hertz, 1 phase
Inlet Connections: 4" inlet grommet standard for DWV pipe. Other inlet configurations available from factory.
Discharge Connections: Pump discharge terminates in 1-1/4" NPT female thread. Can easily be adapted to 1-1/4" PVC pipe or any other material required by local codes. E/One requires the installation of its stainless steel UNI-LATERAL to prevent backflow from the sewer system from entering the grinder pump station.
15 gpm at 0 psig
11 gpm at 40 psig
7.8 gpm at 80 psig
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.