Thermostatic Cartridge for Altmans & Sigma THEXCART 18.30.155

“1/2″ Thermostatic Shower Cartridge for Sigma Faucet 18.30.352 16 Point” 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…

“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

$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.

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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