"kmatz" wrote in message
...
My showerhead leaks when any other water source is running (i.e. wash
machine, dishwasher, faucets, upstairs shower).....what is the
problem? It is driving me crazy!!!!

Is it leaking hot or cold? Is it a thermostatic valve? My guess is a drop
in water pressure is causing some internal valve parts such as the
anti-scald device to malfunction.