Question about Water Heaters
I turned the temperature both on the bottom and on the top to 150 degrees, the results I had no hot water. I turned off the circuit breaker; turned the temperature down to 125 both on the bottom and on the top. Opened the pressure valve and let some water out. This morning, there was a leak coming down my attic door. I dried the pan, turned on the shower and the pan filled with water, the pan is NOT OVERFLOWING. I brought the water temperature both on the bottom and on the top to below 125 degrees and I do not see any more leaking from the attic. Could the high temperature have caused this problem? And why would it? Should you not be able to have the temperatures set for really hot water?
I recommend safety changes to prevent ruptured water heater and assorted leaks.
135 degree hot water.
Maybe replace TP valve if it is dripping.
Drip pan under water heater with 3/4" drain line to outside.
Expansion tank on incoming cold water line to absorb pressure build-up, and prolong life of tank and plumbing.
1) Yes you can have scalding hot water.
2) I recommend 135 degrees since that will burn the evil right out of ya. And generally kill clothes washing bacteria.
3) 150 is dangerous and can seriously burn skin in 1.5 seconds. Not safe around children and elderly.
4) Temperature settings on electric water heater are approximate, since thermostats are calibrated approximately, and read temperature through tank wall.
5) Also if you want to increase amount of hot water for high-consumption household, then setting tank temperature upward is one solution since more cold water is mixed with hot, so amount of hot inside tank goes further.
6) High temperature can cause TP valve to release water.
TP valve is pressure-temperature safety valve. Do NOT cap off.
Rating should be 125 psi and 180 degrees ... but all things water heater are approximate, and TP valves need replacement now and then.
It is not recommended by water heater manufactures to use 150 psi TP valve when water heater came with 125 psi. Rating shows in small print on end of TP. New TP valves sold at local hardware. Let tank cool before installing new one.
7) Higher temperature and high pressure can rupture tank.
Pressure over 80 psi shortens life of water heaters and plumbing fixtures. Put BTG100 pressure gauge on water heater drain valve to check pressure.
8) You need a drip pan with 3/4" drain line to outdoors, or to drain vent line, to prevent flood caused by ruptured water heater.
Turn water heater off when going on vacation.
Inspect water heater each 6 months.
Drip pan available at local home center or hardware:
9) Heated water expands and puts pressure on tank and pipes.
Water does not compress... so when water gets hotter it expands against tank wall and against pipes.
Especially in closed system (check valve present) when system is without expansion tank.
Expansion tank is installed on incoming cold water line.
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
it could be the fact thath the water comming in is what the problem is,, on a well system the water is extra cold and the unit is working hard and with sand aso comming in it makes it harder to keep the temp up on the water,,, flush the tank, put hose on it and open the drin valve with a hose on it turn the cold water on and let it flow till the water comes out clear usually about 5 min,,, get all the sand out and other debris and try it
Posted on Jun 06, 2009
yes, sounds like the temp control is bad, you should be able to google model# and thermostat to find replacement. should be fairly easy to swap out
Posted on Aug 19, 2009
Once in a while flicking the little handle will reseat the valve or release whatever dirt is under it. Usually not...
Your best bet is to replace it.
Turn off your hot water heater and drain the water down past the valve. It jusr screws out and the new one will screw back in.
You can find a new valve at any hardware, HomeDepot or Lowe's they are not exspensive at at.
I hope that this will help you to solve your problem!
Thanks for using Fixya!!
Posted on Dec 03, 2009
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