General Pump Pressure Washer Pump Unloader Valve 4.2 GPM, 3000 PSI

Protects pump with bypass at 300 PSI instead of 3000-plus PSI. Permits a maximum volume of 3 to 4.2 GPM. 100 to 3000 PSI maximum discharge pressure. Soft start design allows pressure to build slowly instead of creating a big pressure spike when you pull the trigger. 165° maximum water temperature. Inlet and bypass ports are 3/8in. NPTF. Outlet port is 3/8in. NPTM. All stainless and brass internal parts. No external moving parts or springs.