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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…

“Fast, friendly, knowledgeable, hard to find items not carried by most big box stores. ”
-William S.
02/23/2026

$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…

“I texted him a picture of the shower part from the 50’s I needed and he was able to identify it immediately. I ordered it and it showed up in two days! Very knowledgeable and friendly! ”
-Jim F.
02/04/2026
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