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Pressure Balance Shower Cartridge for Sigma Faucet 18.30.893

Tan plastic cartridge with blue top red limit stop brass stem black rubber o-ring and black rubber seal.
Pressure Balance Shower Cartridge for Sigma Faucet 18.30.893 - Image 2
Pressure Balance Shower Cartridge for Sigma Faucet 18.30.893 - Image 3
Pressure Balance Shower Cartridge for Sigma Faucet 18.30.893 - Image 4

chat iconWHAT OUR CUSTOMERS SAY…

“Really great experience getting parts for my 30-year old frost free silcocks. They not only had the parts available, but they were shipped within a couple of hours. Great job, thank you! ”
-Phil R
02/08/2026

$46.47

 

The Sigma 18.30.893 cartridge is a pressure balance shower cartridge used in Sigma and Sonoma Forge shower valves to control water flow and temperature. It is specifically designed for use with Sigma pressure balance shower valves purchased from mid-2014 onwards.

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: 21915-2 Category: Tag:

Are you experiencing a leaking shower head, low water flow, or fluctuating water temperatures? Restore your luxury shower faucet with the Sigma 18.30.893 Pressure Balance Cartridge. This heavy-duty faucet cartridge maintains a steady water temperature even when other faucets are running, protecting from sudden bursts of hot or cold water.

 

18.30.893

 

  • Used in pressure balance style faucets to help maintain a nearly constant water temperature.
  • It is a reversible cartridge; if the hot and cold water are reversed after installation, the cartridge needs to be rotated 180 degrees and reinstalled.
  • For use with Sigma pressure balance shower valves purchased from mid-2014 to present. It also fits certain Sonoma Forge concealed shower valves.
  • 3″ Length
  • Square or regular broach

 

Customer submitted images. 

 

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…

“This place rocks! I have replaced two parts for an old Gerber faucet in the laundry tub. After the spout was leaking, I could not find the right washers anywhere. I had to replace the whole spout, which they had in stock, and it was priced competitively. Now, not a drop leaks. ”
-John D.
02/03/2024
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