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Flush Valve Seal for Mansfield 630-4837 for 208/209 Series Toilets

chat iconWHAT OUR CUSTOMERS SAY…

“I spent the balance of 3 days looking locallyfor a replacement head for our Kitchen sink...only to find these guys with an exact fit and finish and lower than market pricing...I immediately ordered (an awesome website with smooth cart checkout). 20 minutes later I find a blown out gasket/ring that I was able to replace, and avoid having to replace entire spray head. I text there support line ( while the store was closed!) Requesting the order to be canceled. Within minutes and without hesitation or questions they had refunded my card and canceled the order. They have one of the largest online inventories, notably stocking harder to locate stuff and boasting a separate text line dedicated to recieve customer pics of parts/gear to ensure we are getting exactly what we need. Enough said. Bring your future plumbing problems/needs here and trust you will be taken care of...I know I will... @ Noels, thanks for continuing a tradition of honorable business practice, in a world that is littered with allot less... ”
-John M.
03/14/2026

$5.47

 

The Mansfield 630-4837 is an old-style, black rubber flush valve diaphragm seal kit designed specifically for Mansfield #208 and #209 Watersaver flush valves. If your toilet is continuously running or leaking water from the tank into the bowl, replacing this seal is the standard fix.

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: 13135 Category: Tag:

Stop your toilet from constantly running and eliminate costly water waste with the Mansfield 630-4837 Replacement Flush Valve Seal. Specifically engineered for older-style tower systems, this premium rubber diaphragm seal acts as a direct replacement component to restore your toilet’s optimal flushing performance.

 

208-209

 

  • Designed specifically to fit Mansfield Model 208 and 209 Watersaver flush valves.
  • Easy DIY’er Quick-fix design allows you to easily slip the replacement ring into the top groove of the valve tower.
  • Made from durable, high-quality rubber formulated to withstand frequent use and resist everyday wear.

 

Customer submitted image. 

 

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…

“Really great experience getting parts for my 30-year old frost free silcocks. They not only had the parts available, but they were shipped within a couple of hours. Great job, thank you! ”
-Phil R
02/08/2026