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Old 12-17-2012, 02:55 PM   #16
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


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Originally Posted by tylernt View Post
I can see why it might be a bad idea to shut off both valves and leave the water heater on, as it could make the T&P valve drip (and things might even go boom if the T&P is frozen shut).

But code is another matter, I'm also curious if it really is code.
I have heard this statement before but no one has given me a reference. Our local inspector tried to fail a fellow plumber's heater install but he backed down after protest.
Most of my work over the years has been commercial plan and spec jobs. The water heater details drawn by mech. engineers always showed 2 valves and I cannot recall a time it was not excepted by the inspectors.

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Old 12-17-2012, 03:13 PM   #17
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


I would have been charged over 100 dollars to cut the CPVC pipe in the crawl space so I saved some money. Calling plumber who I know will probably only charge me 30 dollars to turn valves on top of water heater. Now I can keep cat in house without putting her outside all the time. I was worried about her playing with washing machine valves and causing water damage. Later I can build junction box that she can't play with if I need to. Washer is in garage now. Cat used to jump up on washer easily and would clean herself up there. She has big 25 by 10 foot room to live in now. Her brother was hit by car October 15, 2012. Only had that cat 3 months. Hopefully I will have her for many years. Had a cat from 1986 to 2007 and never got hit here. Street here is really not that busy. Laundry mat is ok for now. Included are four pictures. One of my cat walking over 8 lbs now, cat that died who is brother of cat I have now that went from 5 lbs to 8 lbs in 3 months, my previous cat near squat rack in house that weighed 5 lbs but very smart, and other is cold water valve without water running to it anymore. Cat should be safer.
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Old 12-19-2012, 10:27 AM   #18
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


Not certain what is going on with water pipe that extend out from water heater to furnace. This water pipe goes under house and coming out of water heater about a foot above floor. Going to call plumber probably and ask him what I should do. Hope to get under house before Christmas.
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Old 12-19-2012, 10:34 AM   #19
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


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Not certain what is going on with water pipe that extend out from water heater to furnace. This water pipe goes under house and coming out of water heater about a foot above floor.
Those pictures are of a natural gas line, not water.
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Old 12-19-2012, 11:56 AM   #20
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


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Those pictures are of a natural gas line, not water.
That means the two valves on top of the water heater are where the water flows. Then I can probably cut the pipe in crawl space without more than a small amount coming out of it. Calling my plumber and asking him if he needs to come out and turn valves on top of water heater. He probably won't have to and all I have to do is turn valve at the road off. Thank You !!!!
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Old 12-19-2012, 12:02 PM   #21
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


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That means the two valves on top of the water heater are where the water flows.
Correct.

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Then I can probably cut the pipe in crawl space without more than a small amount coming out of it.
Right.

On the red knob on the lower front of the water heater, the one that says Hot - Warm - Vacation, please set it to Vacation before closing the two valves on top. When you're done working, you can turn it back to the original setting.
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Old 12-20-2012, 02:53 AM   #22
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Turning off hot water to fix 1/2 inch CPVC pipe in crawl space


It really scares me that I could have damaged the water heater even when I cut the cold water CPVC pipe in the crawl space last Friday on December 14, 2012. I siphoned water from the CPVC pipe a little bit to try and stop water from dripping from the water pipe in the crawl space. However, doing this could have caused all the water to drain out of the water heater depending on the height of the pipes that go into the water heater which are up top. Scary !!! I was thinking about the pipes on top of the water heater being well above the bottom of the water heater where a heating element might be but I really don't actually know how deep they go into the water heater. They could go down one foot, two feet, or three feet. Guess water heater is about five foot high.

Sure someone mentioned there isn't a heating element inside the water heater and the water heater would not be damaged or would it. ????? I don't know how it works or whether it could be damaged. I am just lucky I did not siphon water too hard and cause it all to drain out of the water heater. Damn lucky. That water heater cost about 800 dollars and to install it about 500 dollars probably. I would be out 1300 dollars possibly if I had kept siphoning to use primer and cement. Lucky I used the sharkbite and stopped for the day.

They have all the stuff at Home Depot to install and repair your plumbing pipes. However, they fail to warn customers that the water heater could be damaged if you don't be careful and turn those valves up on top of it. I still don't know if that has to be done. I will have to talk with Home Depot and several local plumbers about this. I may print this forum topic and they will know what I am talking about. Print the pictures I used here and see what I should do when cutting and repairing pipes in the crawl space. I mean you can put in new bathroom and kitchen faucets but to install new pipes in crawl space I'm thinking you might have to do some stuff to keep from damaging water heater. That means turning the valves off on top of water heater. Not going to worry about it. In my opinion Home Depot, the This Old House TV show, and home maintenance people throughout America didn't give people proper warning about this.
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Last edited by steve3847; 12-20-2012 at 12:37 PM.
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