Thermostatic Cartridge for Altmans & Sigma THEXCART 18.30.155

“Diverter Cartridge for Sigma Faucet 18.30.069” has been added to your cart. View cart

Bright brass cartridge with black rubber o-rings stainless steel screen and copper thermo.

WHAT 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

$180.47

The Altmans & Sigma THEXCART & 18.30.155 is a thermostatic shower valve cartridge used to stabilize water temperature and provide anti-scald protection. It is a replacement cartridge for several luxury shower systems, most notably the Sigma Simply Safe series and Altmans 8000 Series faucet bodies.

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.

Share on:

Restore flawless temperature control to your luxury shower with the high-performance Thermostatic Cartridge for Altmans & Sigma THEXCART 18.30.155. Engineered as a premium, direct-fit replacement for the Sigma Simply Safe 18.30.155 shower valve body, this heavy-duty brass cartridge eliminates erratic temperature swings, leaks, and poor water pressure. Designed for both professional plumbers and DIY home repair enthusiasts, it brings your high-end bath fixtures back to factory-new performance without the expense of a full valve replacement.

THEXCART 18.30.155