General Pump 18mm Plunger 51040109

SKU 8.703-185.0 Category
  • Genuine Interpump / General Pump Parts
  • 18mm Ceramic Plunger
General Pump
Genuine General Pump OEM Parts


Part Number: 8.703-185.0
Cross Reference Part Number(s): 1-51040109, 104798, 87031850
Manufacturer’s Part Number (MPN): 51040109

Use this ceramic plunger on General Pump and Interpump brand pumps. A cracked or broken ceramic piston can allow water into the pump crankcase, reducing lubrication and possible pump damage. A broken ceramic plunger can also sometimes be seen by a slight water leak between the pump body and pump manifold. Failure to replace a broken ceramic piston can result in further damage to pump, pump seals, unloader valves, and other pressure washer parts.

For use on General Pump Models: TT941, TT9111
For use on Interpump Models: WW94



General Pump Models

TT9111, TT941

Interpump Models


Pump Models (All)

TT9111, TT941, WW94

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