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Old 01-09-2010, 08:22 PM   #1
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Hot Water Heater!


I am replacing a hot water line under the house that goes to the bathroom sink. It leaks.

Question....What do I turn off to make sure there is no water going to spray out when I take out that line?

I have.....

**A cut off for ALL the water at the street...easy to turn, new unit.

**A hot water cut off at the water heater

**A cold water cut off at the water heater

**Individual hot and cold water cut offs under the bathroom sink

Tell me what to do before I crawl under the house and start putting that new piece of pipe to the sink.

Thanks!!!

Chuckwagon....Texas

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Old 01-09-2010, 08:32 PM   #2
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Hot Water Heater!


The bathroom shut-off only shuts off water to the sink

You should be able to shut off the hot water at the WH
Shutting off the cold before the water heater may allow the tank to drain

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Old 01-09-2010, 10:55 PM   #3
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Hot Water Heater!


Shut off the hot water at the WH also shut off the hot water shut off at he sink. You are going to have a pipe full of water so you will get wet. The reason for shutting of the valve at the sink is so you don't get water fed through from the cold if someone turns on the faucets in the bathroom.
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Old 01-10-2010, 06:59 AM   #4
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Hot Water Heater!


BE CAREFUL, Sounds like you are going to be at the lowest point in the system even with everything off you could still get a lot of water flowing out of the pipe from the hot water storage tank.

Maybe not. Just expect the unexpected.

Shut off the gas or electric to the HWH just in case it empties.

Sometimes you can TRAP the system water from flowing by shutting everything off, personally I never had much luck at that I usually just shut off the main water and the valves on the HWH and then open all the hot and cold water faucets to drain out any left over water.
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Old 01-10-2010, 07:14 AM   #5
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Hot Water Heater!


1. Turn off both hot and cold cutoffs for the water heater. (to prevent water from siphoning out of the tank making the following steps take a long time)

2. Repeat, turn off the gas or electricity to the water heater.

3. Turn off the main water shutoff for the house.

4. Open the lowest level faucets hot and cold, for example a laundry sink.

5. Open upstairs faucets, namely drain the plumbing system.

Now most of the water should be out of the system so only a small amount will get all over you when you cut open the pipe you are fixing.

When you are done, turn on hot water faucets upstairs and make sure water is flowing out of them before turning the gas or electricity to the water heater back on.
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Last edited by AllanJ; 01-10-2010 at 07:17 AM.
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Old 01-10-2010, 08:44 AM   #6
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Hot Water Heater!


Not trying to rip your post just a comment that's all.

Most hot water heaters I have seen only have 1 shutoff on the cold water incoming side.

So be careful of Step #1
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Old 01-10-2010, 08:58 AM   #7
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Hot Water Heater!


Quote:
Originally Posted by SULTINI View Post
Not trying to rip your post just a comment that's all.

Most hot water heaters I have seen only have 1 shutoff on the cold water incoming side.

So be careful of Step #1

SULTINI you are RIGHT! I don't know where I got the idea I had a shutoff on the hot water side!!! I DON'T have a shutoff on the hotwater side!

Can I do this......shut off water to the house at the street shut off........shut off the cold water inlet to the hot water heater.........TURN OFF the gas supply to the water heater..........open all the faucets hot and cold to relieve pressure.

Would the above procedure make it fairly safe to begin work on the water line?

I plan to

**cut the water line below the leak which is about two foot below the faucet.

**install a SHARK BITE fitting where I cut the pipe.

**use half inch roll copper tubing from the SHARK BITE to beneath the sink

**install a compression fitting to the copper tubing

**install the water line from the faucet to the compression fitting

Will this scenario work?

Thanks for any advice.
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Old 01-10-2010, 01:45 PM   #8
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Hot Water Heater!


That's what I would do, remember you will always get some water out of the cut line.

Maybe somebody else out there has a better way.

Check back and see.

I'm sure there are many ways to do it.

GO FOR IT!!!!!!

PS: Remember to make sure your HWH is full of water before restarting.
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Old 01-10-2010, 02:05 PM   #9
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Hot Water Heater!


Quote:
Originally Posted by SULTINI View Post
That's what I would do, remember you will always get some water out of the cut line.

Maybe somebody else out there has a better way.

Check back and see.

I'm sure there are many ways to do it.

GO FOR IT!!!!!!

PS: Remember to make sure your HWH is full of water before restarting.


Thanks a lot for the info! I plan of doing the job later this week.

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