User wrote:
I have a partially finished basement in a 15 year old house. From the
unfinished utility room I can see between the basement ceiling and the
ground floor floor. I have the AC pipes and new copper water pipes
in this space running the length of the basement. It is slighly less
than a foot in height.

In the basement I hear a dripping sound or a clicking sound on a
fairly constant basis. Every 30 seconds or so. This has been going
on for as far as I can recall; several months. There is absolutely
NO sign of water or other codensation. I figure after several months
if it was a leak I would have seen something by now. The floor above
is carpet on top of plywood. Could I have gremlins running around in
the AC pipes? Water condensing in the AC pipes? Or is it just the
floor settling?
Anything I should be concerned about?

Thanks

I would guess it is most likely condensation going down inside a drain
pipe where it belongs. or the expansion - contraction of hot water pipes or
heating ducts.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math