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Newport Brass 1-103 Replacement Stop Valve Assembly

Bright brass top with grey plastic base with black rubber o-rings and stainless steel filter.
Newport Brass 1-103 Replacement Stop Valve Assembly - Image 2
Newport Brass 1-103 Replacement Stop Valve Assembly - Image 3

chat iconWHAT OUR CUSTOMERS SAY…

“I sent in photos of a broken cartridge (still installed, couldn’t take it out myself due to water shut-off restrictions in a condo) and even with the limited view they were able to tell me the exact part I needed so I could have it ready for the plumber (meaning I didn’t need to pay for a plumber to come out twice!!) ”
-Alaina W.
06/27/2026

$71.27

 

The Newport Brass 1-103 Replacement Check Stop Valve Assembly is for use with Newport Brass tub, shower, and 3/4″ thermostatic valve 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: 91103 Category: Tag:

Don’t let a dripping faucet or a tricky temperature imbalance disrupt your day. The Newport Brass 1-103 Check Valve and Stop Valve Assembly is a DIY solution Engineered as a direct replacement component for the 3/4″ Thermostatic 1-540 Valve, this high-quality brass stop is a straight forward repair with household tools.

 

1-103

 

  • Check stop / stop valve assembly / check valve stem (OEM #1-103, Cross-reference #400791)
  • Allows you to shut off the water supply locally right at the valve body when you need to change or service the primary thermostatic cartridge.

Common questions about this product

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.

 

 

Will this item replace the original OEM part? chevron-icon

Yes, this aftermarket part will replace your OEM part. 

chat iconWHAT OUR CUSTOMERS SAY…

“I was very happy with Noel’s Plumbing. I was searching for a fairly rare part and saw it listed on their website. After placing my order, I was informed that the item was actually on backorder. Noel’s Plumbing was upfront and honest right away, letting me know it might take some time to arrive. Throughout the wait, they consistently kept me updated, which I really appreciated. When the part finally came in, they shipped it out immediately. It arrived exactly as described and was precisely what I needed. Excellent communication, honesty, and follow-through. Thank you, Noel’s Plumbing! ”
-Dave F.
04/04/2026
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