See table below and if you are unsure what thread size you need please contact us

1500 PSI Maximum Rated Pressure

90 °C / 195 °F

2900psi Rated Pressure (3200psi Max Allowable)

General Pump - Interpump 51 series TT9091 triplex pressure wash pump

Interpump WW960 "44 Series" Bare Pump 3000psi 3.5gpm Fits 1" Gas Engine Shaft Model:WW960BCV - Internal Unloader See table below and ifGeneral Pump Interpump 44 series WW960C triplex pressure wash pump. Replacement pump fits most 9 to 15hp gas engines with 1" shaft. 3000 PSI Maximum Rated Pressure 3. 5 GPM @ 3400 RPM 1" hollow shaft Flange for gas engine: 9 to 15hp Inlet: 1 2" FPT (requires pump inlet for garden hose sold separately) Outlet: 3 8" FPT (3 8" MPT with unloader) Built in unloader included, otherwise sold separately. Do not install pump without unloader or pressure