UNLOADER REGULATOR, 21 GPM @ 5800 PSI SS Pacific Bay Equipment Sale! from $999.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. UNLOADER VALVE - VB80 / 400 STAINLESS-STEEL Rated PSI: 5800, Max PSI: 6500 GPM: 21.0 Forged Stainless-Steel Body All Stainless-steel Valve Parts Viton Seals 1/2" FPT Inlet, Outlet, Bypass