This horizontal shaft high-pressure washer pump delivers up to 4400 PSI and 4.4 GPM, effectively tackling tough stains. Recommended operating pressure of 4000 PSI meets typical home and light industrial cleaning needs. Designed for 1-inch horizontal shaft engines, it’s perfectly compatible for quick replacement and installation. | Vevor | | Pressure Washer Pump, 1" Shaft Horizontal Triplex Plunger, 4400 PSI, 4.4GPM, Replacement Power Washer Pumps Kit | Black | Best Buy