PUMP HOTSY HP3535G1, 3.5 @ 3500, 3400 RPM Pacific Bay Equipment Sale! from $564.00 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. HP Series: Direct Drive 3.5 GPM 3500 PSI 8.4 HP 3400 RPM 1" shaft