Hi
I have this problem of hot and cold water in my home. When someone is taking shower and someone else flushes the toilet or turn anu other tap on, the shower water turns hot or cold depending on if the other tap turned on was hot or cold. Shower water temparature should not change if other tap is turned on in the house. Can anybody suggest any solution?
THX

A lot of people have this in their home. I have had this in every house I have lived in. the hot water only goes to one place at a time. I think you have to get a different kind of water boiler in order for it to go to every place or have something changed on the boiler.

This is absolutely a volume problem. How old is the home, what type of water service and water supply pipes do you have.(copper,pex, galvanized, etc). And what size are the lines(3/8,1/2,3/4,, not likely 3/8 unless you have a trailer house).

Your heating epuiptment will not affect this, whether you have a boiler or water heater(unless only hot side is affected). But you say both hot and cold are affected, so this rules out heating epuiptment. Please give us some more details into your plumbing and we will try to give helpful suggestions. Lee.

Hi all:

I suspect what we have here is the older 2 or 3 handle tub/shower valve setup. In other words, you don't have a single handle temperature and pressure balanced tub/shower valve.

If in fact this is a 2 or 3 handle tub/shower valve then there really isn't much you can do to stop the fluctuations you mentioned except, of course, not to turn on any fixtures when showering... ;) The other option would be to remove the old tub/shower valve and replace it with a single handle temperature and pressure balanced tub/shower valve.

The older valves were famous for fluctuating temperature/volume as you mention. Here, for example, when someone opens a cold water faucet when someone is showering there is a drop in pressure/volume in the cold water feeding the valve and that results in an imbalance between the hot and cold water supply and people get scalded. It is the same when someone opens a hot water faucet, only there is a cold "SHOCK" that is experienced by the person taking a shower.

The newer single handle temperature and pressure balancing valves fixed this by balancing these pressure/volume fluctuations such that when someone opens a cold water faucet, for example, there is a corresponding drop in pressure/volume to the hot water and the person only notices a drop in volume... not in temperature. A much more comfortable and much safer way to have things! That make sense?

If you don't have a 2 or 3 handle tub/shower valve and you have a single handle then I would guess that the temperature/pressure balancing spool is defective and will need to be replaced. We would need to know a name on the valve to help with this... ;)

Let us know how many handles... O.K.?

MARK

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