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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.
Pressure Balance Tub & Shower Cartridge for Mainline - Image 2
Pressure Balance Tub & Shower Cartridge for Mainline - Image 3
Pressure Balance Tub & Shower Cartridge for Mainline - Image 4
Pressure Balance Tub & Shower Cartridge for Mainline - Image 5
Pressure Balance Tub & Shower Cartridge for Mainline - Image 6

chat iconWHAT OUR CUSTOMERS SAY…

“The cartridge in my kitchen sink broke last week so I've been without that sink for a whole week. I ordered a replacement from Noel's, which I could not find anywhere else and it worked perfectly. Thank you! You saved me! ”
-Matt F.
09/19/2025

$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.

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…

“After I tried several different stores to find the part I needed, the man at Noel's front desk took one look at my broken faucet stem and brought me the correct replacement. No more leaks! ”
-Taylor C.
04/21/2023