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Old 04-01-2019, 07:51 PM   #1
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Exclamation Freeze copper line to stop flow

I would like to freeze a 1/2" "M" copper water line with dry ice to add a 1/2" valve 6' down stream. Anyone ever do this? How much of the line do you apply the ice to? 2"? 4"? 6"? How long? cloth around line first? Obviously over freezing would cause the line to split. Not good! I know there can be no water movement while this operation is being attempted..... When I was an apprentice in 1980 I was with a journeyman that froze a 3" "L" line in a hospital and it worked! I know they have commercial kits designed for this, but I would like to try this if I get some good answers here. The reason I can't just shut the main valve is I'm on the bottom of 4 story 32 unit resort condo and it's a lot of hassle to schedule a shutdown.
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Old 04-01-2019, 09:20 PM   #2
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Freezing worker i have use freeze kits over the years many times. You have to be prepared for things to go wrong dry ice isn't a good way to go, you need a kit. One thing you need to do is stop all flow our you will get wet. You need lots of time usually figure on twenty minutes. Live with the hassle it will be better in the long run.
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Old 04-02-2019, 05:15 PM   #3
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Can you let it fly while you propress on a valve?








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Old 04-03-2019, 12:30 AM   #4
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Quote:
Originally Posted by Mykeeb33 View Post
I would like to freeze a 1/2" "M" copper water line with dry ice to add a 1/2" valve 6' down stream. Anyone ever do this? How much of the line do you apply the ice to? 2"? 4"? 6"? How long? cloth around line first? Obviously over freezing would cause the line to split. Not good! I know there can be no water movement while this operation is being attempted..... When I was an apprentice in 1980 I was with a journeyman that froze a 3" "L" line in a hospital and it worked! I know they have commercial kits designed for this, but I would like to try this if I get some good answers here. The reason I can't just shut the main valve is I'm on the bottom of 4 story 32 unit resort condo and it's a lot of hassle to schedule a shutdown.
Try it on a pipe in your backyard or garage before trying it on a job
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Old 04-03-2019, 11:33 AM   #5
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I have done this before with a kit and if there is flowing water, you will get wet LOL. Even if its just a very small flow. But if its a slow drip then be prepared to have a couple extra bottles in stand by, you will blow through them. I hated that machine before ProPress came around.
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Old 04-03-2019, 01:11 PM   #6
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Quote:
Originally Posted by Mykeeb33 View Post
I would like to freeze a 1/2" "M" copper water line with dry ice to add a 1/2" valve 6' down stream. Anyone ever do this? How much of the line do you apply the ice to? 2"? 4"? 6"? How long? cloth around line first? Obviously over freezing would cause the line to split. Not good! I know there can be no water movement while this operation is being attempted..... When I was an apprentice in 1980 I was with a journeyman that froze a 3" "L" line in a hospital and it worked! I know they have commercial kits designed for this, but I would like to try this if I get some good answers here. The reason I can't just shut the main valve is I'm on the bottom of 4 story 32 unit resort condo and it's a lot of hassle to schedule a shutdown.
If you can at leas slow it down, clean the line, have a full port ball valve ready, cut it and use a line plug, solder then pull it out.
Or pro-press and pull it out.


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Old 04-03-2019, 01:32 PM   #7
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We h;;ad one of those freeze kits and they dont work too well...
all water must be arrested and nothing flowing through the pipe.....

have you considered either a pro press or a shark bite ball valve......
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Old 04-03-2019, 06:08 PM   #8
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http://www.jomarvalve.com/products/add-a-valve.html
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Old 04-03-2019, 10:57 PM   #9
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I like the add a valve and we have a freeze kit from general wire and spring(the snake makers) which does work well, but really you should just shut it down and do it the right way. If it's really that much of a hassle than they should shut down one day and add valves so you can shut off sections. Not having working valves is just stupid and frankly irresponsible. And if they refuse to correct the situation than F them, make them go through the hassle. But don't tuck your tail between your legs because someone else is being stupid.








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Old 04-04-2019, 01:05 AM   #10
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Hey all,
Thanks for the input. I have decided that the risk of something going wrong was too great. I'm scheduling the shutdown.
Thanks again!
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