"leza wang" wrote in message
news:6af6012f-f0d3-4871-acf6-

Wipe it all dry. Turn on the water and watch for drips. Why guess when

you can know, thus, ensuring you fix the leak.

i did that but it is hard to find out where is coming from

Sometimes, if you smear a thin film of dishwashing liquid over the area
where you think the water is escaping from, you can see bubbles where the
leaking water hits the soap. More effective on supply pipes, but I've had
it work on drains, too.

I'd use toilet paper instead of paper towels to wrap the pipe to look for
leaks. It's much easier to wrap tightly around the pipe and fittings.

Remember, too, that leaks travel and follow gravity so the origin could be
some distance away from where you find the water.

--
Bobby G.