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1/2″ Thermostatic Shower Cartridge for Sigma Faucet 18.30.300 32 Point

White plastic cartridge with a brass stem copper thermo stainless screens with black orings.
White plastic cartridge with a brass stem copper thermo stainless screens with black orings.
White plastic cartridge with a brass stem copper thermo stainless screens with black orings.
White plastic cartridge with a brass stem copper thermo stainless screens with black orings.

chat iconWHAT OUR CUSTOMERS SAY…

“Went in with an old faucet stem that no big box store carried, left with a replacement in less than 5 minutes. ”
-Andrew J

$178.47

 

The 18.30.300 is a 1/2″ Exposed Thermostatic 32-Point Cartridge designed as a replacement cartridge for Butler Mill exposed shower systems.

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: 41855-1 Category: Tag:

Are you dealing with a leaking shower or erratic water temperatures? Stop temperature spikes and restore perfect temperature control with the 18.30.300 1/2″ Exposed Thermostatic 32-Point Cartridge. Designed for the Butler Mill exposed valve system and compatible Sigma thermostatic shower sets. Engineered with precision for a smooth DIY installation, this cartridge is the ultimate cost-saving fix to return your luxury shower to its peak performance.

 

18.30.300

 

  • 4″ length
  • Features a 32-point brass tip.

 

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.

 

 

chat iconWHAT OUR CUSTOMERS SAY…

“After trying all over my area, I couldn't find the part for the faucet in my older house. The part I needed was found on the first try on their website and ordering was very easy. It was after hours, but someone responded to my text right away. The part was shipped the next business day. After putting the new part in the faucet works better than it has for years! ”
-Mark B.
06/25/2026
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