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Old 05-26-2013, 03:46 PM   #1
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Water Heater Draining/Refill


Hello.
I followed the process to drain a water heater and I am not sure if the shutoff valve connected to the cold water supply works. Here is why:
I turned off the cold water supply valve that leads to the water heater and the gas supply line. Then, hooked up a hose and opened up the drain valve along with a sink in my bathroom to prevent the vacuum effect. Drained it for over an hour and noticed no slow down in the flow. Here is where the confusion comes in. When I opened up the supply line again to refill the tank, I didn't hear a thing
I also opened up the pressure release valve and noticed water coming out from the pipe (side if house).
So I think it's the shutoff valve that needs replace because:
1) there should not have been any water coming out of the pressure release valve pipe on the side of my house because that tells me it's full to the top.
2) I didn't hear more water coming out when I turned the shutoff valve back on.

Any help with this would be awesome. Need more info....let me know. Thanks!

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Old 05-26-2013, 04:03 PM   #2
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Water Heater Draining/Refill


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I turned off the cold water supply valve that leads to the water heater hooked up a hose and opened up the drain valve
Drained it for over an hour and noticed no slow down in the flow.
Did you consider closing the main water valve at this point?

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So I think it's the shutoff valve that needs replace...
It happens.

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Old 05-26-2013, 04:14 PM   #3
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Water Heater Draining/Refill


Hi TarheelTerp,
I did. I just want to confirm that my suspicions are correct. I am just curious because the house is only 7 years old so that seems a little early to have to replace that valve. Thanks for the reply!
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Old 05-26-2013, 04:54 PM   #4
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Water Heater Draining/Refill


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Hi TarheelTerp,
I did. I just want to confirm that my suspicions are correct. I am just curious because the house is only 7 years old so that seems a little early to have to replace that valve. Thanks for the reply!
Sounds like your suspicions are correct. Can you post a pic of the valve? Gate valve or ball valve?
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Old 05-26-2013, 04:57 PM   #5
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Water Heater Draining/Refill


If gate valve, they don't last too long. Better to have ball valve on main water line feeding hwh.
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Old 05-26-2013, 05:18 PM   #6
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Water Heater Draining/Refill


I agree. I've never turned the water off when just trying to flush the tank.
Need the pressure to try and forse the sedimant out.
Should of only need to run that water about 5 min.
Gate valve should be outlawed, they never shut the water off fully and leak around the stems after a few years.
Sure hope you removed all the aeriators of the faucets and the shower head when you flushed the lines or your next post will be about reduced water flow.
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Old 05-26-2013, 05:21 PM   #7
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Water Heater Draining/Refill


Did you open the hot water on your bathroom faucet to prevent airlock?
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Old 05-26-2013, 06:23 PM   #8
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Water Heater Draining/Refill


When you shut the valve at the tank off open a hot-side faucet somewhere. If the water stops flowing out, then the valve works.
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Old 05-26-2013, 09:25 PM   #9
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I opened up the tap on my bathroom sink to prevent airlock. This water heater is equipped with a gate valve. It seems to be stuck in the open position and it's not leaking, so I guess there is no sense in replacing it just yet. Thank you all for your help!
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Old 05-27-2013, 12:17 PM   #10
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This water heater is equipped with a gate valve.
It seems to be stuck in the open position and it's not leaking,
so I guess there is no sense in replacing it just yet.
Wanna try that again?
The whole point of having a valve is to be able to shut off water.
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Old 05-27-2013, 12:47 PM   #11
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Water Heater Draining/Refill


Don't forget, you need to turn off the water heater heat before draining a significant amount of water from the tank. When you are done working, refill the tank long enough so water is gushing from a hot faucet upstairs before turning the heat back on.

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