UNLOADER 8-3600-ST261 Pacific Bay Equipment Sale! from $116.00 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. PSI Regulation: 0-3600 GPM: 1.0 - 8.0 Temperature: 176°F 3/8" FPT Inlet & Outlet 1/4" FPT Bypass Stainless-Steel Plunger and Seat Forged-Brass Body and Viton Seals Weight: 22.5 oz.