Jay


If I had a leak in a single handle faucet wouldn't I be seeing what
under
sinks, etc? Where can I look for this?

Sorry, I should have been clearer. The "leak" is actually a shunt between
the hot and the cold pipes. In a single handle faucet when the handle is
off, if the cartridge is worn it is possible for hot water which has higher
water pressure to flow through the faucet and then out the cold water pipe
if you use municipal water. There is no external leak for you to see. turn
off one faucet at the undersink shutoff valves (hot and cold) tonight. Does
that fix the problem for the morning's shower? Do the same for all the
faucets and hopefully you'll find a culpit.

Dave M.