Professional heavy-duty high volume high pressure, trap type pressure adjustable unloader,releases pressure in pump head when in bypass and discharge the water from the bypass port.
Direct the water from bypass port back into the inlet port with a soft connection hose, and make the pump work as internal bypass mold, features with easy start function.
Brass body and stainless steel valve core,Pressure adjustable by screw and locknut for secure the working pressure.
Commonly use for industrial application,like sewer cleaning,car washing etc.