Approximately 6 months ago we renovated our bathroom and installed an
AquaBrass thermostatic valve and hand shower. The product worked
great until the last couple of weeks where something has started to go
wrong. There are 3 clear symptoms we have observed as a result of the
1) When you first turn on the shower the water comes out extremely hot
regardless of the temperature setting. This lasts for about 10 to 20
seconds and then the water cools off to a more normal temperature
2) After the temperature settles down the shower simply will not get
very hot even with the temperature knob set all the way to the left
3) Elsewhere in the house we get hot water coming out of the cold
water taps for about 10 seconds or so (regardless of whether the
shower is on). I have traced the problem to the shower where my guess
is that the thermostatic value is allowing hot water to flow through
into the cold water pipes.
Up until a couple of weeks ago everything was working perfectly. No
other plumbing changes have occurred in the house recently.
Any thoughts or ideas on what may be the problem and how it could be
fixed would be greatly appreciated! Thanks for your time.