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Thermostatic Cartridge for Harrington Brass 2351A-HF

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“Do you need a vintage plumbing part and nobody seems to be able to find it in your area? Save yourself time and hassle and go to Noel's Plumbing website. You can text them a photo of the part and they will find it in minutes and give you the link to order it, all at a competitive price. My plumbers seem incapable of doing this and hand the job off to me. What can you do? But Noel's always has the 1930s parts I need or the aftermarket part that will get the job done. If I need it fast I can get it in 2-3 days from them and they know exactly what they are doing. It's a good old-fashioned plumbing store with all the parts you could possibly need and people who know how to get them. The service is top level. The staff pick up the phone after one or two rings. They are polite and KNOWLEDGABLE. I'm so tired of dealing with folks who can't find a chicken in a hen house. LOL. ”
-Bry W.
06/23/2026

$393.05

 

The Harrington Brass 2351A-HF is a 3/4″ thermostatic shower valve cartridge. It regulates water temperature for consistent and safe performance in a thermostatic shower system, helping to prevent sudden temperature spikes.

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: 22140 Category: Tag:

Restore optimal performance to your premium shower system with the Harrington Brass 2351A-HF 3/4″ Thermostatic Cartridge. Engineered specifically for high-flow Harrington Brass thermostatic shower valves, this heavy-duty brass replacement cartridge fixes fluctuating water temperatures, low water pressure, and stubborn leaks. By precisely regulating hot and cold water mixing, it ensures a safe, consistent shower temperature and anti-scald protection for your bathroom.

 

2351A-HF

 

  • This cartridge is designed to regulate water temperature for consistent and safe performance in a thermostatic shower system, helping to prevent temperature fluctuations.
  • It is specifically designed for use in Harrington Brass fixtures, including the 3/4″ thermostatic shower valves.
  • 3 15/16″ length
  • 20 point broach

 

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…

“Hey these guys are awesome! If you need a part for a fixture they have it send a picture and they can tell you what it is, they know their stuff, they have the weird obscure things you can't find unless you get a whole trim kit or whatever. Worth the trip and the money. They save you tons of time definitely visit ”
-Justin H.
06/05/2026