How do you tell if the faucet has this device or not? Until i read through
some of the other posts that mentioned this anti-scald device i wasnt even
aware that the faucets could contain such a thing. My shower goes lukewarm
after 5 minutes and I was going to pull the dip tube to check it(50 gallon
NG tank type built in 95/96 and on the list of ones with bad dip tubes)
but now I'm wondering... could it be just the shower faucet?
Run it until it turns cold. Then turn on the hot in the sink. If you
get hot in the sink (give it a minute or two) then it is likely the shower
control. If you don't get hot, then it is likely the dip tube or maybe a
bad heating element on an electric, or a real clogged up heater.
Most anti-scald shower controls are single handle. They have one handle
coming out of the wall that you turn until you get the heat you want.
Some have a second smaller handle in the middle of the big one that is
used to adjust the heat, and the big handle controls flow. If yours has
separate hot and cold handles it probably isn't an anti-scald.
your tank is 10 years old?
just replace the tank its likely filled with crud. buy a 75,000 BTU
model for larger capacity without adding size.
know in advance that attempting to do anything to such a old tank will
likely result in a immediate or long term leak.
if stuff can be damaged by leak replace tank.
to troubleshoot run shower till it gets cold, try other faucets let
run for awahile if they are cold too its the tank.
if all others are hot its the faucet.
there are both pressure balance and temperature control faucets.
temperature control is wonderful
To answer your first question "How do you tell if the faucet has this
device or not?" the test is quite simple.
Turn the shower on to a lukewarm to warm temperature and hold your
hand in the flow as someone flushes the toilet. If the shower output
gets suddenly hotter as the cold water fills the toilet, it is not an
anti-scald device. An anti-scald fixture senses the change in pressure
on the cold (and/or) hot side and rebalances the output to keep the
shower temp constant.
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