Drip in wall after running sink faucet and toilet
I have a drip in the wall next to and behind the sink (other side of wall is utility room) a couple of minutes after running sink and/or flushing toilet. I have run water into the drain of the sink and listened but there is no leak after running water into the drain... it seems to have to do with turning the faucet on and calling for water..
It drips for a few minutes and then I don't hear it anymore..
Once I had this happen and there was some water under the wall that divides the bathroom from the utility room... I have not seen water since and that was quite a while ago... the dripping went away for a while but not it is back and much stronger... the house is on a slab and this bathroom was an addition in about 1960... do not hear drip when running water from any other faucet or the shower which has its pipes on the other side of the room next to the wall of the original bathroom.
Any help