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Pressure Balance Cartridge for Mainline WC0501 RP20131

Tan plastic cartridge with light blue limit stop brass stem black ruber o-ring and blue seals.
Pressure Balance Cartridge for Mainline WC0501 RP20131 - Image 2
Pressure Balance Cartridge for Mainline WC0501 RP20131 - Image 3
Pressure Balance Cartridge for Mainline WC0501 RP20131 - Image 4
Pressure Balance Cartridge for Mainline WC0501 RP20131 - Image 5

chat iconWHAT OUR CUSTOMERS SAY…

“Sent Noel’s plumbing and image of what was needed, not being able to find it. They had it sent to me within a week and fitment was perfect. 👍 ”
-Lorenzo H.
03/12/2026

$58.27

 

The Mainline WC0501 is a replacement cartridge designed for specific pressure-balanced tub and shower valves. It is primarily used to fix leaks or restore water flow control in Mainline’s shower systems.

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: 84191 Category: Tag:

Single Handle Washerless Cartridge for Mainline

 

WC0501

 

  • For use with 458V, 458V-LS and 458V-PEX
  • 5″ length
  • 40 MM Diameter

 

This cartridges replaces the original red cartridge below. 

 

Common questions about this product

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

Yes, this aftermarket part will replace your OEM part. 

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.

 

 

Is this item the original manufacturer's recommended replacement part? chevron-icon

Yes, this is the OEM recommended part.

chat iconWHAT OUR CUSTOMERS SAY…

“These people were extremely helpful in taking me through replacing a 25 year old hard water frozen cartridge on my Philrich sink faucet. They were able to identify the correct part I needed from a photo I sent (I had it figured out wrong). I was pleasantly surprised they had an obscure part like this, but they also told me how to extract the old one when I couldn’t get it out. They said to unscrew it after I had concluded from YouTube the old cartridge was supposed to just slide out. It threaded out as they said and saved me buying a cartridge extractor and a hernia. The whole experience has been excellent. ”
-Pete L.
03/10/2026