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Gerber DA603923 Check Valve for 1/2″ & 3/4″ Thermostatic Valve

Brass cartridge with black rubber o-ring and washer with brass screw.
Gerber DA603923 Check Valve for 1/2" & 3/4" Thermostatic Valve - Image 2
Brass cartridge with black rubber o-ring and washer with brass screw.

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“Outstanding fast delivery on two pieces of an ancient Wolverine bath stem for Kohler - from the early 40s I think. The new one has a different body design, but it screwed directly into the old hot/cold tree and was the exact 6" length. Forty eight hours after installation now, and all remains fine. Also, kudos to the people who set up the website and ordering process. Great work - clear photos and info ! PS: I'm not an employee or family...lol. I retired from electrical wholesaling here outside Chicago and I appreciate a good job. ”
-JM C.
07/31/2026

$27.14

 

The Gerber DA603923 is a brass check valve designed for use with 1/2″ and 3/4″ thermostatic valves in plumbing applications. It is a genuine replacement part manufactured by Gerber.

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: 54603 Category: Tags: ,

Built from solid, corrosion-resistant brass to ensure lasting durability, leak-free operation, and premium resistance against hard water tarnishing.

 

DA603923

 

  • Check valve / check stop.
  • Constructed of durable solid brass, which resists corrosion and tarnishing.
  • Designed for use with specific Gerber and Danze 1/2″ and 3/4″ thermostatic mixing valves, such as Model D155000BT.

 

Related document

 

Gerber D155000BT Thermostatic Valve Parts Breakdown

Common questions about this product

Is this item the original manufacturer's recommended replacement part? chevron-icon

Yes, this is the OEM recommended 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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