Heating and Cooling› Fluid Cooler Pumps

Johnson

Magnetic Drive Circulation Pump

$240.04

SKU: CM30

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Johnson CM30 is a magnetically driven circulation pump with a brushed motor designed for continuous use. This heavy-duty pump is compact and powerful, making it ideal for circulating water or antifreeze in automotive, marine, and RV heating systems, as well as for fresh water cooling. It is a normal-priming centrifugal pump that requires a flooded mounting position or priming before operation and should not be used with soiled water containing hard particles.
Show original supplier description
The Johnson CM30 is a heavy-duty, magnetically driven circulation pump featuring a brushed motor engineered for continuous operation. Its seal-less design and compact size make it a powerful solution for various circulation needs, including water or antifreeze in heating systems for vehicles and boats, and fresh water cooling. This pump is suitable for applications where self-priming is not a requirement, but it must be mounted to ensure it is always flooded or primed before activation. The CM30 is constructed from durable PPA thermoplastic and stainless steel components. It is rated for pumping water up to 100° C (212° F) and offers hose connections of either 16 mm or 20 mm. The magnetic drive system ensures a sealed pump chamber, enhancing its reliability in various conditions. Johnson Pump backs this circulation pump with a limited 2-year warranty.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandJohnson
Part NumberCM30
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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