SEAFLO 12V 3.0GPM 45PSI Water Pressure Pump 33 Series Marine RV

Three-chamber on-demand water pressure pump

A 12V self-priming diaphragm pump for marine, caravan and RV water systems requiring up to 3.0GPM open flow and a 45PSI cut-off. The automatic pressure switch starts the pump as outlets open and stops it when system pressure is restored.

Technical specifications

Applications and compatibility

• For multiple taps, galley, washbasin or compact shower systems on 12V yachts, motorboats, caravans and RVs.
• Manufacturer material describes the 33 Series as suitable for three or more 13mm outlets, subject to actual demand and pipe losses.
• Confirm the 45PSI setting is acceptable for any water heater, filter, accumulator and tap connected to the system.
• Not suitable for fuel, solvents or other flammable liquids.

Installation and package contents

• Mount dry and ventilated on the full rubber base, with access for winterising and servicing.
• Use an inlet strainer, reinforced hose and airtight suction plumbing; an accumulator can reduce cycling and pulsation.
• Wire through a correctly rated fuse using cable sized for the 6.74A maximum draw and circuit length.
• Package contains one SEAFLO 33 Series pump. Confirm the exact quick-connect adapters and strainer supplied with the unit before ordering.

Frequently asked questions

Does the pump start automatically?

Yes. The on-demand pressure switch controls start and stop as outlets are used.

Can it supply several outlets?

It is designed for multi-outlet systems, but simultaneous performance depends on total demand and plumbing losses.

Can it run dry?

It tolerates short dry-run periods; prolonged dry running should be avoided.

Is 3.0GPM available at 45PSI?

No. 3.0GPM is the open-flow rating; flow reduces as pressure increases.