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M_L_News
 
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I had (and continue to have) a similar situation. But mine is
definitely related to the drain-side. When I run my 2nd floor bathroom
sink, the waste water proceeds down the plastic drain pipe that is in
the outside wall. The warm water passing next to the 1960's-era
aluminum siding causes thermal expansion which _sounds_ like
drip-drip-drip about every 1/2-to-1 second. It took me a while to
figure out because it's more severe with warmer water and colder
weather, but the big clue was that I never found any leaking or pooling
water.

So - two questions for you: Do your supply pipes pass near any metal
surfaces ? Have you ever found any water stains or leaks ?


waltermelon wrote:
I tried collecting the water in a container.. there was the dripping
noise before I let the water go from the container.. and none after I
let the water go. It looks like the problem is at the supply side

then.
And it happens with cold as well as hot water. Should I get a

plumber?
Is this beyond help??
Thanks a lot for your replies