After a period on "Vacation" setting, my HWH overheated and released a little
water from the presure relief valve. It has not repeated this action over the
past two days, but obviously this requires some expert attention. Would it be
cost effective to bring in a repairman for a possible repair, or would it be
best to simply replace the whole appliance?
If its over 10 years old then I would lean to replacement. First
1. Did you drain it once a year to minimize the setiment build up?
2. Is it snappn' and poppn' after using hot water
If it's under 10 years old fix it and do step one. If you know it's old
and has setiment replace it!
There comes a time in the affairs of man when he must take the bull by
the tail and face the situation. -- WCF
The relief valve actually is dual purpose; it will open if the
water becomes scalding hot *OR* if the tank pressure exceeds
Unless you know for a fact that the water got extremely hot, I'd bet
it was relieving pressure. That could have been due to high city
street pressure (transient?) or due to thermal expansion.
(It might have been due to a faulty relief valve but I'm skeptical
since it reclosed.)
Anyway...the whole thing may not have been the heater's fault, so don't
rush to judgement.
It is gas, two years old, is not leaking, and has no expansion tank. The water
was very hot, but the burner was off when I discovered the fault.
What I really want to know is: is there an easy fix for this or should I just
go down to Home Depot and replace the tank?
email@example.com (Kaysue555) wrote in message
It should have a combination valve with shutoff/pilot-only settings
_and_ a thermostat. These thermostats are pretty crude, with
set-point changed by rotating knob/shaft, from "hot" to "not that
hot". Some can be set to pretty high temp. Note that they sense
water temp in bottom of tank, with heated water accumulating above, so
there's no strict correspondence between setting and water temp at
I'd suggest you do a bottom-flush on the tank to remove sediment, and
call your gas company to check out the t-stat, and set it to safe
temp- around 130 deg F.
On 21 Nov 2003 11:54:17 GMT, firstname.lastname@example.org (Kaysue555)
Yeah, Hump on down to Home Depot and get another water heater. If
you're lucky, maybe it'll last you 2 yrs and a month.
Get a "Real" water heater. Better yet, get someone in to find out what
your problem is before you waste your money on another water heater
that trashes itself too.
More likely, when the water cooled it contracted. Drew in some more water
into the tank. The water reheated, and expanded. Might be your water meter
or some where else in the system has a check valve. The heating / expansion
released the extra volume through the TP valve.
I wouldn't worry about it.
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