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Kohler K-300-K-NA 1/2 Inch High-Flow Valve System

Item #: BCI223082
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Product Details for the Kohler K-300-K-NA

This product has additional required/recommended options. To configure, add to your cart.

  • Extension Kit Recommended

This 1/2-inch ceramic valve works behind the scenes to give you optimal performance from your KOHLER faucet. It features brass construction for durability, and long-lasting ceramic valves that offer a lifetime of smoothly functioning water flow


  • High-flow valve ensures optimal water flow performance.
  • Quarter-turn ceramic disc valves exceed industry longevity standards, ensuring durable performance for life.
  • 15.0 to 17.0 gpm (gallons per minute) flow rate.
  • For use with bath- or deck-mount faucets.
  • Requires valve trim (sold separately).
  • Brass construction.
Our SKU: Kohler K-300-K

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

Kohler K-300-K Reviews

Rated 5 out of 5 by from Very Satisfied! Our plumber had no problem with this rough-in set. I was concerned about compatibillity with our 23-year old plumbing, but it went into place with no problems at all. Great service and very fast shipping!
Date published: 2010-04-28
Rated 2 out of 5 by from Poor design Too long; poor for a wall mount which I needed. The wall mount valve was too short. There don't seem to be any options to replace old wall mount valves.
Date published: 2010-11-05
Rated 4 out of 5 by from Good fit and function, would buy them again These valves are solid. Quality material and craftsmanship. The instructions walked me through my first installation of this kind. One of the valves was not sealing and Kohler send me a hot and cold replacement valve under warranty. These can be serviced through the top - no need to remove the whole valve body. I am satisfied with the finished product and I would buy again.
Date published: 2012-07-16
Rated 5 out of 5 by from Pleased We are very pleased with our new Kohler Roman Tub faucet. We had purchased the shower and sink faucet in this series from a local store but could not find the matching faucet for the garden tub. We were able to find a match to our other faucets quickly and easily through your website, and we received it in just a few days. It completed our new bathroom and we are thrilled with the Kohler quality.
Date published: 2008-10-19
Rated 5 out of 5 by from Kohler Valves this tub valve works great. Water supply is forceful yet contained and perfectly aerated. Tub fills quickly and quietly. What more can I say?
Date published: 2008-11-08
Rated 5 out of 5 by from Outstanding Product This Kohler valve is well designed and installed easily. Its all brass and should last forever. Installation instructions were easy to understand.
Date published: 2009-01-28
Rated 4 out of 5 by from instructions could be better Installed this on a finished deck. Instructions call for 2 3/8 copper pipe for central faucet tube which forces the hot and cold water valves to be so low above the deck that the Devonshire handles barely engaged the valve. Would suggest using 2 1/4 or less for that piece of copper pipe. Otherwise solid components that seem to be of good quality.
Date published: 2009-03-30
Rated 2 out of 5 by from skeptical One plumber told me the valves were old and used, and another plumber said they were only tarnished. The threads were okay, so I went ahead and used them.
Date published: 2009-10-22
2 Questions from the Community
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Will this valve work with the Alteo Roman tub filler?

The Kohler K-300-K can be used with the Kohler K-T45115-4 Alteo Double Handle Roman Tub Filler Faucet Less Valve with High Arch Non-Diverter Tub Spout

what is the gpm flow?

The Kohler K-300-K is a high-flow valve allowing water to flow 16-18 gpm at 45 psi.

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