The VHP31 series unloader is machine forged constructed with a brass valve body with a stainless steel ball & seat for years of trouble free operation. With a maximum flow of 66 GPM the unloader can easily manually adjust from 300 PSI up to a max of 4,000 PSI and features a tamper resistant locking ring. 

This regulating unloader automatically sends the water into a bypass loop when the water flow is stopped at the trigger gun or valve allowing for safe release of pressure at the pump head eliminating the dangerous chance of over pressurization.

VHP31/250-310 rated for 66 GPM @ 4,000 PSI 

Both unloader will have a Max temperature of 194 F. Degrees and will have a On inch Female inlet, Outlet & bypass