Speakman RPG05-1124 Sentinel Mark II Cartridge

“Single Lever Cartridge for Bradley Briggs Kohler Sayco & Universal Rundle P301 28500-5” has been added to your cart. View cart

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.

WHAT OUR CUSTOMERS SAY…

“They had my part shipped the same day. I mistakenly checked that I would pick the part up at the store and they fixed it in minutes. ”

-Michael F.

01/04/2026

$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.

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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

Yes, this is the OEM recommended part.

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.

WHAT OUR CUSTOMERS SAY…

“Noel's Plumbing Supply found this place on Google maps. In and out service. The person I was speaking to the desk offered me a selection knew exactly what I needed price was really reasonable. You don't know how much it means to a homeowner to be able to come in without any run around trying to sell you something you don't need. I recommend this establishment to all my family and friends. ”

-Steve C