On 12/21/2014 1:10 PM, Larry Blanchard wrote:
On Sat, 20 Dec 2014 18:58:19 -0800, Gramps' shop wrote:

I think I may have mentioned (on more than one occasion) how much I hate
plumbing. This week I was faced with two challenges -- a nonfunctioning
fill valve on a Kohler one-piece toilet and a slow drain in the shower.

I've got a continuing challenge. A shower that leaks water out from
underneath and even into the basement - but only when running. So far:

1. Doesn't leak when shut off so no problem in the piping below the
valve.

2. Valve showed evidence of a slight leak as corrosion on the brass so
it was replaced - still leaks.

3. Plumber took off the shower head and replaced it with a piece of pipe
- sealed on the end. Turned on the water, turned it off, and went away
for a day. Still had pressure in that pipe when he came back, so no leak
in or above the valve.

4. Shower head that had been removed showed a little thread damage so we
replaced it. Still leaks.

5. I put a seal over the drain and filled the shower basin with water up
to the 3-4" ledge. It took better than 24 hours to gradually leak under
the seal, which was just one of those flat rubber disks. So no leak in
the shower stall floor.

So what's left? I suppose there could be a leak where the drain screws
into the pipe, but considering the way that fitting works it's highly
unlikely. I'll check it to be sure.

The only other thing I can think of is to seal the floor and walls with
some of that rubberized finish like they make for tool handles. I can
peel it off after the test.

I've been ignoring it for a month or so hoping a solution will spring
into my mind but that doesn't seem to be happening :-).

Eliminate the normal source of water.

Pour water in the drain directly form a large pot, see a leak down below?