SEAFLO 24V 1.0GPM 40PSI Water Pressure Pump 21 Series Marine RV

Compact on-demand pressure pump for 24V systems

A small self-priming diaphragm pump for one or two low-flow outlets on boats, caravans and RVs. It provides up to 1.0GPM at open flow and automatically stops when system pressure reaches 40PSI.

Technical specifications

Applications and compatibility

• For a galley tap, washbasin or other compact water circuit on a 24V boat, caravan or RV.
• Manufacturer guidance identifies the 21 Series for one to two modest fixtures; the 1.0GPM rating is for low-demand service.
• Check heaters, filters, taps and plumbing for compatibility with a 40PSI cut-off pressure.
• For clean compatible water only; never use with fuel, solvents or flammable liquids.

Installation and package contents

• Mount dry and ventilated on a stable surface with vibration isolation and service access.
• Fit an inlet strainer and airtight suction hose; match the selected connector configuration to the installed plumbing.
• Use correctly sized 24V wiring and circuit protection for the 2A maximum draw and cable length.
• Package contains one SEAFLO 21 Series pump. Verify the exact port fittings and strainer supplied before ordering.

Frequently asked questions

Does it start automatically when a tap opens?

Yes. Falling pressure activates the on-demand switch.

Can it supply a normal shower?

Its 1.0GPM open-flow capacity is intended for lower-demand outlets and may be insufficient for a conventional shower.

Can it run from 12V?

No. This version requires 24V DC.

Is 1.0GPM available at 40PSI?

No. The open-flow rating falls as pressure rises.