The water in the upstairs bath keeps running out...... (tank, bathroom, showers)

[Thinking-man]

hi,
we have two showers upstairs....the master has no issues.....but the guest bathroom (which we use for our kids) has an issue: every night, when we turn it on, it starts running but after a second or two, the water stops. we turn off the knob, then turn it on, and get another second or two of water.....this goes on for 5 or 10 minutes, before the water starts running normally....

what's going on?

[K'ledgeBldr]

Time to replace the valve-

[Thinking-man]

Originally Posted by K'ledgeBldr

Time to replace the valve-

which valve?

[Squirl]

The valve in the faucet

[Thinking-man]

hmm....the bathroom and all faucets are only about 3-4 years old.....someone told me it's the pressure regulator....could it be that?

[thecoalman]

Originally Posted by Thinking-man

hmm....the bathroom and all faucets are only about 3-4 years old.....someone told me it's the pressure regulator....could it be that?

A pressure regulator issue would affect all your fixtures. That's not something that is on individual fixtures.

[nybbler]

It's like the old ping pong ball in the gas tank trick, except it works and there's no gas tank.

[chet everett]

The symptom sounds like the "thermostatic mixing valve" also know as an "anti-scald valve" for the guest bath / kids shower is faulty. Some are designed to allow repair without total replacement and it worth determining if somehow it could just be misadjusted, but it should not be overly expensive to repair.