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Old 02-11-2012, 11:11 AM   #1
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Replacing Cold Water Fill Valve on W.H.


As I was making space for my soon to arrive air compressor I noticed that my water heater was leaking from the cold water fill valve. Today I plan on cutting it off and sweating on a new one. The end that connects to the heater is also leaking so that will go too.

Does anyone have any tips or things I should know before I begin. I'm thinking...

Shut off gas to heater

Turn off water

Will I have to purge air from heater afterwards?

Thanks for any help you can give me!
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Old 02-11-2012, 11:14 AM   #2
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Replacing Cold Water Fill Valve on W.H.


screw the gate valve use a ball valve

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Old 02-11-2012, 11:18 AM   #3
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Replacing Cold Water Fill Valve on W.H.


Replace it with a ball valve not a gate like you have there.
A super simple fix would be to cut out the old valve and install a new 3/4" Shark Bite shut off.
The reason it corroded is because it looks like someone use a steel nipple. It should have been a Dielectric nipple instead.
http://www.sharkbite.com/usa/en/prod...&category_id=7

Last edited by joecaption; 02-11-2012 at 11:23 AM.
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Old 02-11-2012, 11:26 AM   #4
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Replacing Cold Water Fill Valve on W.H.


Yes there's going to be some air in the lines that should just blow out when you open a faucet.
Remove all the airiaters on the faucets and the shower head. Run some water through the lines and reinstall so trash does not plug them up.
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Old 02-11-2012, 11:29 AM   #5
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Replacing Cold Water Fill Valve on W.H.


Is this what you are referring to?

http://www.freshwatersystems.com/p-5...-x-34-cts.aspx

And am I reading this correctly??? Can it be??? It's PUSH FIT? That would be awesome! I assume that's why you mentioned it would be easier.

As far as the connection line..would I have to use a non-threaded end on one side with a threaded end on the tank side?

And finally, what about purging any air?
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Old 02-11-2012, 11:30 AM   #6
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Replacing Cold Water Fill Valve on W.H.


Oops...I was typing as you were
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Old 02-11-2012, 11:38 AM   #7
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Replacing Cold Water Fill Valve on W.H.


Quote:
Originally Posted by joecaption View Post
Yes there's going to be some air in the lines that should just blow out when you open a faucet.
Remove all the airiaters on the faucets and the shower head. Run some water through the lines and reinstall so trash does not plug them up.
Would I need to do this on all of them, or just the one I choose to purge the air through?
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Old 02-11-2012, 11:59 AM   #8
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Replacing Cold Water Fill Valve on W.H.


All of them.
There's always going to be trash knocked loose inside the plumbing when making repairs like that.

Last edited by joecaption; 02-11-2012 at 12:16 PM.
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Old 02-11-2012, 12:05 PM   #9
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Replacing Cold Water Fill Valve on W.H.


Thank you very much! I didn't even know about those SharkBite fittings...not having to sweat a new valve on just made my weekend.
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Old 02-11-2012, 12:35 PM   #10
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Replacing Cold Water Fill Valve on W.H.


Try tightening the packing nut under the handle before replacing the valve
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Old 02-11-2012, 04:25 PM   #11
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Replacing Cold Water Fill Valve on W.H.


Better yet shut the valve off and see if water still comes out of the faucet.
Those gate valves alway get trash stuck in the bottom where the gate is suppost to seal and will not shut off completly, ot the shafts wring off because the gates stuck in place.
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Old 02-12-2012, 03:50 AM   #12
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Replacing Cold Water Fill Valve on W.H.


Well...I just finished...installing my new water heater...yeesh!

The steel nipple wouldn't come out and was rusted almost solid inside and out. After spending hours trying to get it out..and then it breaking off in the old heater...it was apparent that it wasn't my day. Eventually it was just beyond salvage so I went and bought a new one.

I did use the push fit style fitting on both hot and cold lines and they worked great. They spin which feels odd but there were no leaks.

Thanks for all of your help guys.

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