Full-Flow 1/2" Thermostatic Cartridge for Sigma 18.30.082

Bright brass cartridge with black rubber orings and copper thermo.

Full-Flow 1/2" Thermostatic Cartridge for Sigma 18.30.082 - Image 3

Old plastic version of this thermostatic cartridge.

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

$204.17

The Sigma 18.30.082 is a 1/2″ thermostatic valve cartridge used primarily in Sigma and Eurotherm shower systems to regulate water temperature.

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Replace your worn-out shower cartridge with the Sigma 18.30.082 1/2″ thermostatic valve. Engineered for precision, this high-performance cartridge dynamically mixes hot and cold water to maintain your set temperature, ensuring a comfortable shower while providing reliable anti-scalding protection. Replaces earlier plastic versions with a durable, all-brass construction for longevity.

18.30.082

Replaced with an all brass version.
Thermostatic cartridge, also known as the Eurotherm Sigmatherm 1/2″ Thermostatic Cartridge.
3 1/2″ Length

Customer submitted image.

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.

Yes, this aftermarket part will replace your OEM part.

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