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Sewer Systems

Grinder Pumps

D-Series | DH502 & DR502 Grinder Pump Station

E/One DH502 Grinder Pump StationThe E/One model DH502/DR502 duplex (2 pumps) grinder pump station is an ideal choice for multiple single-family homes and light commercial applications. Grinder pumps collect  wastewater from the building and send it to the central sewer and/or treatment system through small-diameter pipes.

This model was previously known as the Model GP 2016.

Drawings & Installation Instructions

DH502/DR502 Drawings (PDF, 1 mb)

DH502/DR502 Drawings (zipped DXF, 1 mb)

Extreme Series Pump Curve (PDF)

DH502/DR502 Installation Instructions (PDF, 2 mb)

Download Product Specification


The DH502/DR502 grinder pump station consists of two pumps and a tank with a dry accessway. The grinder pumps use integrated level-sensing pressure switches instead of floats — the "core"-style pump is compact and easily removed for service if needed.

  • The DH502 is the “hardwired,” or “wired,” model where a cable connects the motor controls to the level controls through watertight penetrations.
  • The DR502 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 from tough, corrosion-resistant FRP and provides 500 gallons of capacity. A single DH502/DR502 can be used for nine average, single-family homes, and up to 24 homes where codes allow and with consent of the factory. The DH502/DR502 can accommodate flows of 6000 gallons per day.

Stations are available for indoor and outdoor installations. Outdoor stations accommodate depths from 102 inches to 160 inches (see drawings, above).

E/One requires the installation of its stainless steel UNI-LATERAL to prevent backflow from the sewer system from entering the grinder pump station.

Inlet Connections: 4" inlet grommet standard for DWV pipe. Other inlet configurations available.

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

Recommended Alarm Panel

E/One Sentry Protect Plus 

Additional alarm panel options are available, including remote monitoring.


E/One Grinder Pump Operational and Electrical Information