Heating and Cooling› Water Pumps

Johnson Pump

WATER PRESSURE REGULATOR

$30.16

SKU: J02C 40057

In Stock
In Stock
Ships by Jun 15
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Johnson Pump 40057 is a water pressure regulator designed for deck wash applications. This regulator reduces city water pressure to a range of 40-50 psi. It is constructed from corrosion-resistant bronze and features a standard 3/4" GHT thread for easy connection. This product is not intended for use in portable water systems.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandJohnson Pump
Part NumberJ02C 40057

Buy with Confidence

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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