If I understand the question correctly... the answer is NO. Both of the external valves (the pressure relief valve, at the top and the drain valve, at the bottom) can be replaced. Usually these valves are prone to clogging if the water is considered "hard." If the HWH is old 12-15 yrs. then it probably needs replacement soon, and the newer models (Energy Star) will save you some money, over time. Good Luck!
Douglas
A 1999 Dodge Ram does not have a water control valve.
It does not have a water flow valve in the heater plumbing.It does not have a water flow valve in the heater plumbing.
woot woot
Replace the shower valve.
I was charged $464.00 and I thought that was a bit rich to replace a T&P Valve today 26/09/11
The hot water valve should always be open, so the hot water can exit the heater into the system. If your actually meaning opening the drain valve on the bottom of theater, the water in the heater will drain, starting with the hot water stored there, and then the cold water that is entering the tank to replace it will simplt flow out the bottom before being heated. Dpending on where the heater is located will denepnd on how much of a mess the ensuing flood will be.
Step 1) Stut off your water heater gas valve. Step 2) Drain the heater. Step 3) Disconnect is the gas flex hose. Step 4) Remove the gas valve from the tank. Step 5) Fix a new valve and reverse all the steps.
The 100%correct answer is as close as possible , because you donβt want to run around the building to close the tab .
A TNP valve is a temperature and pressure valve found on a water heater.
If the water is dripping, I would replace it just to be safe. It doesn't cost much money.
According to DIY on Hot Water Promblems if theres not enough water then you hit the reset button. If the water is too hot then change the temperature and reset. If you have a leaky heater then you need to replace the valve. If you have a rusty tank then you need to replace the water heater. If you have a noisy heater then you need to drain and flush the tank. If you have dirty water then drain and flush the tank and do it on a regular basis.
No, cold wter enters the water heater at the bottom of the tank, right where thee valve is.