Pulsar VB75 Unloaders 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. The VB75 is an integrated unloader for INTERPUMP/GENERAL pumps with 7.8 GPM - 3600 PSI max pressure. Rated pressure: 3200 PSI 200 °F 3/8" MPT inlet, 1/4" FPT gauge port 3/8" FPT outlet & bypass