Water Heater Leaking At Cold Water Inlet Outside. - Plumbing - DIY Home Improvement | DIYChatroom
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Old 01-26-2015, 06:18 PM   #16
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I've tried the shut off valve no luck. I've tried draining no luck. We do have hard water here in the desert. Maybe a new water heater?? It is kind of old.
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Old 01-26-2015, 06:20 PM   #17
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Quote:
Like Javiles said
I think you meant rjniles.
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Old 01-26-2015, 06:29 PM   #18
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Quote:
We do have hard water here in the desert. Maybe a new water heater?? It is kind of old.
Just changing the water heater will not fix the valve dripping.

Changing the valve should fix the problem, whether you replace it or replace with a new valve and expansion tank.

Your hard water (or other sediment) might be the cause of one of the internal components no longer seating properly.
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Old 01-26-2015, 06:31 PM   #19
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Will the expansion tank be installed onto the cold side??
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Old 01-26-2015, 06:44 PM   #20
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Yes. Something like this.
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Old 01-26-2015, 06:47 PM   #21
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Interesting. Think I can do that. So what happens to the water in the expansion tank?? Goes back into the pipe??
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Old 01-26-2015, 10:15 PM   #22
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Basically, as you know, when the water is heated it expands and the extra volume has to go somewhere. If there is no expansion tank for the extra volume to go, the tpr valve will release the extra volume. When the water cools or you turn on a hot water faucet, the water leaves the expansion tank and goes back to the system.

It's important to set the expansion tank psi to your incoming water pressure, usually around 55psi. Easily checked with a water pressure gauge available at any big box store.
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Old 01-26-2015, 10:57 PM   #23
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Adding a exp. tank would be very easy on your tank.
You will need:
the tank- of course
1- 3/4" galv. tee
1- 3/4" galv 90
1- 3/4" x 21/2" galv. nipple
1- 3/4" x 6" galv. nipple
Assemble the parts as shown in the picture by screwing the tee onto the cw inlet nipple at the heater.
short nipple goes on top the tee and add a new nut x nut flex to connect to your CW supply.
The 6" nipple with the 90 on one end screws into the branch of the tee.
The exp. tank screws into the 90.

Replace the failed thermo gadget with a 3/4" IP ball valve. The new flex supply will connect to that.
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Old 01-26-2015, 11:02 PM   #24
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just make sure you get a true expansion tank, that has a bladder inside
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Old 01-27-2015, 12:15 AM   #25
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Originally Posted by TheEplumber View Post

Buy a pressure test gauge at your hardware store. Screw it on your hose bib and take a pressure reading.
Pressure Gauge

Works on any hose bibb or on the drain valve on your water heater.
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Old 01-28-2015, 12:31 PM   #26
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Originally Posted by TheEplumber View Post
Adding a exp. tank would be very easy on your tank.
You will need:
the tank- of course
1- 3/4" galv. tee
1- 3/4" galv 90
1- 3/4" x 21/2" galv. nipple
1- 3/4" x 6" galv. nipple
Assemble the parts as shown in the picture by screwing the tee onto the cw inlet nipple at the heater.
short nipple goes on top the tee and add a new nut x nut flex to connect to your CW supply.
The 6" nipple with the 90 on one end screws into the branch of the tee.
The exp. tank screws into the 90.

Replace the failed thermo gadget with a 3/4" IP ball valve. The new flex supply will connect to that.
you lost me with all those parts. I don't know what any of these parts are. I guess I can take this list with me to the hardware store.
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