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Speakman RPG05-1124 Sentinel Mark II Cartridge

Black plastic cartridge with burgundy limit stop brass stem and black bottom seal.
Speakman RPG05-1124 Sentinel Mark II Cartridge - Image 2
Speakman RPG05-1124 Sentinel Mark II Cartridge - Image 3
Speakman RPG05-1124 Sentinel Mark II Cartridge - Image 4
Clear platic cartridge with brass stem and black oring.

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

$69.17

 

The Speakman RPG05-1124 is a genuine replacement pressure balance cartridge for Speakman Sentinel Mark II and Echo shower valves. This cartridge helps regulate water pressure and temperature to prevent sudden changes while showering.

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: 18702a Category: Tag:

Speakman Sentinel Mark II Cartridge

 

RPG05-1124

 

  • The RPG05-1124 is a pressure balance cartridge, a crucial internal component that balances the hot and cold water pressure to maintain a consistent water temperature, thus providing a scald guard function.
  • It is a direct replacement part for Speakman Sentinel Mark II and Echo shower valves.
  • It is designed for use with a rotate-handle activation type for single-handle faucets.
  • 4 1/8″ length
  • 40 MM diameter
  • Replaces the version of the cartridge below

 

Common questions about this product

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

Yes, this is the OEM recommended 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.

 

 

chat iconWHAT OUR CUSTOMERS SAY…

“Do you need a vintage plumbing part and nobody seems to be able to find it in your area? Save yourself time and hassle and go to Noel's Plumbing website. You can text them a photo of the part and they will find it in minutes and give you the link to order it, all at a competitive price. My plumbers seem incapable of doing this and hand the job off to me. What can you do? But Noel's always has the 1930s parts I need or the aftermarket part that will get the job done. If I need it fast I can get it in 2-3 days from them and they know exactly what they are doing. It's a good old-fashioned plumbing store with all the parts you could possibly need and people who know how to get them. The service is top level. The staff pick up the phone after one or two rings. They are polite and KNOWLEDGABLE. I'm so tired of dealing with folks who can't find a chicken in a hen house. LOL. ”
-Bry W.
06/23/2026
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