HaquanPump & Valve
WQK Grinder Sewage Pump – Common Problems & Quick Solutions — WQK Cutting Blade Sewage Pump
WQK Cutting Blade Sewage Pump

WQK Grinder Sewage Pump – Common Problems & Quick Solutions

The pump’s cutting mechanism ensures long fibers and soft solids are shredded before discharge, preventing pipe blockages and reducing maintenance costs. Problem Possible Cause Solution Pump won’t sta…

Specifications
Flow Rate10-300m³/h
Head10-30m
Power0.75-22kW
Inlet / Outlet Diameter50-200mm
MaterialCast Iron,SS304

Product Overview

The pump’s cutting mechanism ensures long fibers and soft solids are shredded before discharge, preventing pipe blockages and reducing maintenance costs.

ProblemPossible CauseSolution
Pump won’t startPower not connected / phase loss / impeller stuckCheck wiring, adjust impeller gap to 0.2–0.5mm
Low flow or headImpeller worn / reverse rotation / low voltageReplace impeller, swap two phase wires, adjust voltage
Poor cutting performanceGap too large / blades dullAdjust gap, replace impeller and bottom plate
Protector trips repeatedlyLow insulation / motor overload / phase failureDry motor, check voltage, clean debris

Maintenance Tips:

After pumping thick slurry, run pump in clean water for a few minutes

Change oil every 300–500 hours (use #10 machine oil)

Check insulation resistance regularly (min 0.5 MΩ)

Test seal integrity at 0.2 MPa after repair

Typical Applications

  • Hotels
  • hospitals
  • underground garages
  • municipal sewage plants
  • residential pumping stations
  • industrial wastewater with fibers
  • livestock farms
  • and public sanitation units.

Related Products