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Pressure Balance Tub & Shower Cartridge for Mainline

White plastic cartridge with red and blue limit stops square brass stem and black o-ring and bottom washer.
White plastic cartridge with red and blue limit stops square brass stem and black o-ring and bottom washer.
Pressure Balance Tub & Shower Cartridge for Mainline - Image 3
White plastic cartridge with red and blue limit stops square brass stem and black o-ring and bottom washer.
White plastic cartridge with red and blue limit stops square brass stem and black o-ring and bottom washer.
Pressure Balance Tub & Shower Cartridge for Mainline - Image 6

chat iconWHAT OUR CUSTOMERS SAY…

“The vacuum breaker on my outdoor spigot failed and Noel's Plumbing was the only placeI could find that had the appropriate mfr. part. I sent a text with photos on Wednesday evening to make sure the part I found was correct. In less than 2 hours later, I had a reply confirming it was the correct part. Placed my order that evening and received the part on Saturday afternoon (about 2.75 days) and my plumbing issue was resolved! I highly recommend - I really appreciated the prompt and pleasant response. ”
-Kimberly S.
04/25/2026

$52.47

 

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, asknoel@noelsplumbingsupply.com, or via the text widget on this screen.

SKU: 21560-1 Category: Tag:

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. 

 

Common questions about this product

Is this the correct item for my application? chevron-icon

If you’re not sure text us a picture 1-888-275-6635 or email us a picture at noelsplumbingsupply@fuse.net.

 

We will make sure you have the right part.

 

 

Will this item replace the original OEM part? chevron-icon

Yes, this aftermarket part will replace your OEM part. 

chat iconWHAT OUR CUSTOMERS SAY…

“Sent a picture of the piece I needed for my leaking shower cartridge and was given the correct piece within minutes! Made my life so much easier! ”
-Alexander P
10/28/2022
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