Biswing Pressure Washer Pump 3400 PSI Max 2.5 GPM 7/8″ Shaft Vertical Plunger Re by | Jul 22, 2026(ONLY Fit 7/8″ Shaft Horizontal Engines). EASY TO USE: Features a 3/4″ NH garden hose inlet and M22-14 male thread high pressure hose outlet, this powerful pump can be easily connected to a pressure washer hose.