So the wall would have to be opened to change the valve for this item?
A. The Kohler K-T14420-4 requires a rough in valve part number K-11748-K, if you do not have an access panel to your plumbing then yes, the wall would need to be opened.
What is difference between this model and Kohler K-T144421-4?
A. The Kohler K-T14420-4 tub spout is at a 35 degree angle and the K-T14421-4 is at a 90 degree angle. Other than that, they are the same.
which is the appropriate valve for this?
A. The Kohler K-T14420-4 will need to use either the K-11748-K or the K-11748-KS.
Is there another model with valve included
A. The Kohler does not have any models that include the valve.
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