Heating and Cooling› Fluid Cooler Pumps

Johnson Pump

CHECK VALVE & WASHER ASSEMBLY 4000 PUMP

$23.36

SKU: J02C 50581PK

In Stock
In Stock
Ships by Jun 18
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Johnson Pumps 50581PK is a replacement check valve flapper kit designed for Johnson 4000 GPH Heavy Duty submersible bilge pumps. This component prevents water backflow, ensuring that water pumped from the bilge does not return to the boat when the pump cycles off. It is a direct replacement for Johnson 4000 GPH bilge pump models and is compatible with pumps featuring 1-1/2" or 2" threaded discharge ports.

Fitment

Fitment Guaranteed

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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 50581PK

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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