UNLOADER VB-75 (FITS W151) Pacific Bay Equipment Sale! from $162.00 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. The VB75 is an integrated unloader for Interpump and General Pump with 7.8 GPM - 3600 PSI max pressure. Rated PSI- 3200, Max PSI 3650 Temperature: 195°F 1/2" FPT Inlet, 1/4" FPT Gauge Port 3/8" FPT Oulet and Bypass Weight: 19.7 oz. VB75 Direct Mount Control Set for EZ, 47, 60, 63 & W151 Series