Easy Kleen 2000 PSI @ 4.0 GPM Flange Coupling Drive 5HP 220V 1PH Industrial Hot Water Electric Pressure Washer Natural Gas & Propane Gas 0.5 gal. Use it to replace the SHL N 435 Use it to replace the corresponding parts shown in the manual's exploded view Annovi Reverberi AR RTX30 horizontal gas engine triplex plunger pump is rated up to 8 GPM at max 4350 PSI spins a 30 x 80mm solid shaft at 1450 RPM using a 1”F inlet and 1 2"F discharge thread The belt guard is integrated into the design of the shroud for maximum serviceability and safety The Quick Adjust Air Flow vents allow you to adjust the amount of air that is flowing into the burner chamber