Sewer Systems

Grinder Pumps

W-Series | WH482 & WR482 Grinder Pump Station

WH482 large

The WH482/WR482 is one of E/One's largest-capacity grinder pump stations. This station offers a capacity of 486 gallons and can handle flows of up to 3500 GPD. The WH482/WR482 has two grinder pumps, but is available with up to four grinder pumps.

Drawings & Installation Instructions

WH482/WR482 Drawings (PDF, 2 mb)

WH482/WR482 Drawings (zipped DXF, 23 mb)

Extreme Series Pump Curve (PDF)

WH482/WR482 Installation Instructions (PDF, 2 mb)

Model WH482 — Wired Level Sensor (DOC)

Model WR482 — Wireless Level Sensor (DOC)


E/One's WH482/WR482 grinder pump station consists of two Extreme series grinder pumps inside an open wetwell tank. The grinder pumps, motor controls and level-sensing are integrated into a compact unit, easily removable for service. The station comes with two grinder pumps, but is available with up to four grinder pumps.

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 WH482 is the “hardwired,” or “wired,” model where a cable connects the motor controls to the level controls through watertight penetrations.
The WR482 is the “radio frequency identification” (RFID), or “wireless,” model that uses wireless technology to communicate between the level controls and the motor controls.

The tank is made of tough corrosion-resistant HDPE. Designed specifically for low pressure sewer applications, the optimum tank capacity of 486 gallons provides ample storage. A single WH482/WR482 can accommodate flows of up to 3500 gallons per day.

Stations are available in several heights to accommodate various burial depth requirements. See drawings for more information.

Operational Information

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 PVC 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.

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

US and foreign patents issued and pending.