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March Pumps AC-5M-MD / PMA1000 - 1000 GPH - 115V - Mag-Drive Centrifugal Pump

The MARCH PUMP AC-5M-MD 115V is an American seal-less centrifugal magnetic drive pump. Replaces Dometic PMA1000 Pump. Polypropylene Plastic Pump Head and Impeller, 115V 50/60Hz Air Cooled Motor, Up To 17GPM, 1" FPT Inlet, 1/2" MPT Outlet, 3 Foot Power Cord with No Plug. Commonly used for marine air conditioning, chemical recirculation, and scrubber systems. Upgraded model comes with Noryl Front Housing, 3-Flat Stainless Steel Shaft, Carbon Impeller Bushing

March Pumps Part Number: AC-5M-MD 115V
Replaces Dometic Part Number: 225500065 / 331566 - PMA1000 115V

Reference: AC-5M-MD / PMA1000 115V
In Stock: 2

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MARCH PUMPS AC-5M-MD Mag-Drive Centrifugal Pump 115V - Replaces Dometic PMA1000 Pump

Dometic PMA1000 Pump

The March Pump AC-5M-MD is an American seal-less centrifugal magnetic drive pump ideal for applications such as chemical recirculation, chemical transfer, and scrubber systems. It is capable of generating a maximum flow of 17 gallons per minute at 1 feet, and its maximum head is 27 Feet (or around 11PSI).

The standard wet end (the materials that come into contact with the solution) is composed of Polypropylene, Buna N, Ceramic, and Ceramic Magnet. The inlet connection is 1 inch female pipe thread, and the outlet is 1/2 inch male pipe thread. The standard motor is a 1 Phase 115V or 230V 0.125 Horsepower fan cooled motor, which can be run on either 50 or 60 hertz (there are performance differences between the hertz options). Direct replacement for Dometic PMA1000 Pump 115V Part Number: 225500065, 331566


Pumps are not self-priming, lack a suction lift, and thus require a flooded suction. Pumps cannot be run dry because the impeller requires the liquid being pumped for lubrication. For liquids with a specific gravity greater than water, have a higher viscosity, or for elevated temperatures, a trimmed impeller may be necessary. For application assistance, contact March Pump.


Model is115 Volt and have a 3 ft (0.9 m) Cord. Models have U.L. listed motors, which are rated for continuous duty.

About the Dometic PMA1000 Pump

The March Pump AC-5M-MD is a direct replacement for the Dometic PMA1000 pump (part number 331566). This Dometic pump provides a steady flow of cooling water throughout Dometic marine A/C systems. 

Limited Waranty

March pumps are guaranteed only against defects in workmanship or materials for a period of one year from date of manufacture pumping water. For the complete warranty and to register online go to


Inlet - Outlet: 1” FPT - 1/2” MPT
Max Internal Pressure: 50 psi (3.4 bar)
Max Liquid Temperature: 190 °F (87 °C)
Dimensions (inches): 6.19 x 4.52 x 9.27
Packed Weight (lbs): 8.55

AC-5C-MD Curve


AC-5C-MD Dimensions



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