North America / English Change


Centrifugal Effluent Series
Centrifugal Effluent Pumps

Effluent or dewatering submersible pumps for septic tank, low pressure pipe (LPP) and enhanced flow STEP systems.

Features andBenefits
Literature and Documents

The Clarus Environmental Models 51 and 142 are versatile workhorses for effluent applications.  The low flow design of the pump was engineered originally for STEP applications in which the pump, protected from septic solids by a filtered vault, moves effluent directly out of the septic tank without the need for an additional pump tank.  Higher flow pumps in that environment cause agitation within the septic tank, disrupt the sludge and scum formations, and lead to maintenance headaches.  The model 51 produces a maximum flow of 18 gpm at 5’ of TDH and can reach 21’ at shutoff.  The model 142 produces a maximum flow of 18 gpm at 5’ of TDH and can reach an impressive 62 feet at shutoff!  The pumps have a powder coated, cast iron housing and are capable of passing 1/2” spherical solids.

  • Model 51 is .3 hp, 9.5 FLA
  • Model 142 is 1 hp, 13.0 FLA
  • Non-automatic (N) and automatic (BN) models available
  • 1-1/2” NPT discharge
  • Passes 1/2” spherical solids


All Clarus Environmental products must be installed and maintained in accordance with all applicable codes.

60 Hz
.3 HP (model 51), 1 HP (model 142)
Standard Weight
27 lbs (model 51), 54 lbs (model 142) LBS
115 V
Single Phase
Cord Length
15 ft. (model 51), 20 ft (model 142)
Cord Type
UL listed, 3-wire cord and plug
9.5 Amps (model 51), 13 Amps (model 142)
Cast iron

Performance Curves

Part Number Chart

Part Number Chart
Part Number Description
51-0002 115V/1Ph Non-Automatic 51 Centrifugal Effluent Pump
51-0006 115V/1Ph Automatic 51 Centrifugal Effluent Pump
142-0002 115V/1Ph Non-Automatic 142 Centrifugal Effluent Pump 
142-0006 115V/1Ph Automatic 142 Centrifugal Effluent Pump 

Dimensional Data Drawings