I want to add a small tank-type point of use water heater under my kitchen sink. What is the best way to plumb the overflow? Obviously there is no floor drain under the sink or nearby. Is it possibly to add one somehow to the existing sink drain pipe?
Plumbing – How to plumb a point of use water heater overflow
plumbing
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Best Answer
You can add a “T” fitting to your sink drain there are metal versions available also. The “T” section needs to be above your P trap. This is how dishwashers are usually drained but should be fine for your overflow line.