SEAFLO 42-Series Water Pressure Diaphragm Pump w/Variable Flow For Reduced Cycling - 12V, 3.0GPM, 55PSI ... 10 Consomer Reviews. Johnson Pumps 64535 12V Aqua Jet 3.5 Wash Down Kit (3001.3937) ... Portable design allows for care-free travel with powerful water flow; SEAFLO 41-Series Water Pump provides 4.5 GPM at 70 PSI; Pump has 6 feet of. Bestseller No. 4. SEAFLO 33-Series Industrial Water Pressure Pump w/ Power Plug for Wall Outlet - 115VAC, 3.3 GPM, 45 PSI. UL 778 & CSA 22.2 Certified. Self-Priming up to 6 vertical feet. 3.3 GPM Flow Capacity, 115V AC Current Draw .75 amps (1.2 Max Amps) Built-in Adjustable Pressure Switch that turns on/off at 45 PSI. The Supreme water pump is designed to run on water systems with no accumulator tank necessary. It is also suited for use with a holding tank water system, as may be found in a boat, RV or remote cabin. It provides up to 11.3 liters per minute. The 42 series Seaflo Supreme 12v water pump is self-priming, and can run dry without damage.