Universal Unloader UU1 3500PSI Pacific Bay Equipment 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. The Legacy Universal Unloader is unique in that it allows for height or width adjustments making it ideal for any pump. PSI: 3500 GPM: 6.0 Temperature: 195°F Forged-Brass Body 1/2" NPT Inlet 3/8" NPT Outlet Stainless-Steel and low friction, wear-resistant plunger Weight: 16.1 oz. Pantent US 8,313,311 B2`