Slow kitchen sink drain question....
2015 Keystone Mountaineer, kitchen sink worked fine all weekend. Today while cleaning up the wife says the sink won't drain??? I first drained all the gray water then checked the other sinks.... all g...
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Also, it may be a one way valve or diaphragm that did not reopen--it is in the drain line under the sink. We had that problem last week. At first we thought it might be a full gray water tank too. It was not. Good luck.
