Pressure Balance Tub & Shower Cartridge for Mainline

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White plastic cartridge with red and blue limit stops square brass stem and black o-ring and bottom washer.

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WHAT OUR CUSTOMERS SAY…

“Thank you for exact part. Just received and replaced and worked out great! ”

-Karl D.

09/05/2025

$50.27

The Mainline A507902 is a replacement pressure balance faucet cartridge designed for tub and shower valves. It is specifically used with Mainline “Generation 3” 410-CP and 410-PEX rough-in valves manufactured between late 2008 and mid-2014.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

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Pressure Balance Cartridge for Mainline

A507902

It is a pressure balance cartridge for single-handle faucets/shower valves, which helps regulate water pressure and temperature.
Designed for Mainline 410-CP (Gen 3) valves; also compatible with certain Gerber, Danze, Glacier Bay, and AquaSource models.
5″ length
40 MM diameter

Customer submitted image.