Johnson Pump CM30P7-1 12V Dia20 Circulation Pump

The Johnson Pump CM30P7-1 12V Dia20 Circulation Pump is a compact magnetically driven centrifugal pump for circulating compatible fresh water, salt water, and water-glycol mixtures. Its design combines useful flow with low electrical consumption, so it is well suited to heating, cooling, and other continuous circulation systems aboard compatible vessels.

Magnetic drive transfers motor rotation to the impeller without a conventional shaft penetrating the fluid chamber. This arrangement supports a compact pump body and dependable circulation while reducing reliance on a rotating shaft seal. The pump is intended to operate within the manufacturer's fluid, temperature, and pressure limits.

Confirm fluid compatibility, glycol concentration, electrical protection, hose connections, mounting position, system pressure, and operating temperature before installation. Avoid inlet restriction, support connected plumbing so it does not load the pump body, and bleed trapped air from the circuit before verifying normal circulation. Find more in our bilge and water pumps.

• The pump gives useful flow with relatively low electrical demand.
• Magnetic drive transfers power without a shaft passing through the fluid chamber.
• Supported fluids include fresh water, salt water, and appropriate glycol mixtures.
• The centrifugal magnetic-drive package keeps the installation relatively small.