A very common source of leaks under the kitchen sink is at the sprayer head. Every time you use the sink faucet–whether you use the sprayer or not–the hose to the sprayer is “pressurized.” In other words it is made ready for use. Of course the sprayer head sits looking pretty in its little cradle and if there is a leak it is going to end up in the cabinet below–not in the sink.
Depending on how much storage is under the sink–and of course nobody ever has any storage under the sink–this leak might go unnoticed for considerable amounts of time.
It is a good idea to occasionally check for leaks under the sink.
At a recent inspection I had a leaking spray attachment that I only figured out was leaking when I saw the evidence in the crawl space.
Of course hidden behind all the stuff under the sink there was plenty of evidence of past/ongoing leaking of the sprayer.
By Charles Buell, Real Estate Inspections in Seattle
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