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Old 09-17-2012, 12:15 AM   #1
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safely cut galvanized pipe


hey guys. as yall may know, i am in the process of some renovation. one of the main things im doing is remodeling my bathroom. but, before i do anything, i wanna remove the old galvanized pipe and go with pex or pvc (probably pex). However, I do not have enough money to do a total repipe, therefore, I simply plan of replacing the lines above the floor and tiing into the old galvanized underneath. however, i have been told that when you cut galvanized pipe, its very likly to cause ruptures elsewhere. any advice on how to avoid this? i was thinking maybe using a hack saw and going really slowly...

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Old 09-17-2012, 12:28 AM   #2
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safely cut galvanized pipe


if you do that then you will have to re thread pipe. i would cut pipe 12 inches from a joint and then unthread and then thread a pex fitting in and run from there

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Old 09-17-2012, 12:39 AM   #3
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but can it safely be cut without rupturing other places?
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Old 09-17-2012, 12:47 AM   #4
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safely cut galvanized pipe


i have had a 99.9 percent rate of being able to do it with out a leak using fine tooth sawzall blade
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Old 09-17-2012, 08:01 AM   #5
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safely cut galvanized pipe


Can it be cut without rupturing elsewhere? Probably, but it depends how bad the pipe is. If it is rusted and ready to bust then probably not. If it is still in good condition then probably not problem. A hand hack saw will probably be less likely to damage than a sawsall.
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Old 09-17-2012, 08:07 AM   #6
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safely cut galvanized pipe


You do know that PVC is only used in drain lines never supplys right?
Supplys should only be Pex, CPVC, or copper.
Also you do know all your main lines need to be run with 3/4" then tee off 1/2 to the supplys.
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Old 09-17-2012, 08:45 AM   #7
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safely cut galvanized pipe


you can always unscrew it. use 2 wrenches if you do so you don't stress the joints you are leaving.
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Old 09-17-2012, 09:36 AM   #8
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Quote:
Originally Posted by joecaption View Post
You do know that PVC is only used in drain lines never supplys right?
Supplys should only be Pex, CPVC, or copper.
Also you do know all your main lines need to be run with 3/4" then tee off 1/2 to the supplys.
Not totally true, PVC can be used for cold water supplies. Commonly PVC is used for the service from the meter to the house. At least commonly in my area.

Can be used in the house also but I don't recommend it.

My wife rents a building where all the cold water is PVC and the hot is CPVC. Stupid but that what was done.
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Old 09-17-2012, 10:56 AM   #9
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safely cut galvanized pipe


Quote:
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Supplys should only be Pex, CPVC, or copper.
Yeah, I know
Quote:
Also you do know all your main lines need to be run with 3/4" then tee off 1/2 to the supplys.
The pipe im cutting is 3/4 galvanized, but it is directly under the backroom (furthest fixtures from the meter). I'm thinking about cuttin it with a hacksaw, tiling on with a 3/4 1/2 union, then then runnin 1/2 oex to my toilet, shower, and sink. thoughts?
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Old 09-17-2012, 10:57 AM   #10
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safely cut galvanized pipe


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Can it be cut without rupturing elsewhere? Probably, but it depends how bad the pipe is. If it is rusted and ready to bust then probably not. If it is still in good condition then probably not problem. A hand hack saw will probably be less likely to damage than a sawsall.
the pipe, for the most part, appears to be in good shape.
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Old 09-17-2012, 11:50 AM   #11
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safely cut galvanized pipe


i had to cut numerous galvanized lines in fla while doing remodeling. i learned quickly that you don't use a new metal blade. it grabs the pipe and shakes the crap out of it. old used blades cut slower but don't shake the pipe. if you cut out the 3/4 don't replace it with 1/2 inch, use 3/4.

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