UNLOADER VB350 (MOD.VB7) 4700/6. Hotsy Pacific Sale! 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. Bigger. Stronger. Faster - 5650 PSI. PSI Max: 5650 Rated PSI: 5075 GPM: 10.0 Temperature Max: 195°F Forged-Bronze Body Stainless-Steel Plunger and Valve Seat 3/8" FPT Outlet 1/2" F Bypass 3/8" MPT Inlet, 1/4" Gauge Port Weight: 31 oz.