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Pipe threading

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Heyseed
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PostPosted: Wed Jan 10, 2018 8:45 pm    Post subject: Pipe threading Reply to specific post Reply with quote

I have to cap a galvanized pipe in an old building. The end will have no threads and I'm looking for ideas. I see that Harbor Freight has a threading tool. Anyone know about the quality? This may be the only time I use it so spending a lot doesn't make sense.
Will the size be the same for Galvanized and black pipe?
Any thoughts on using a Dresser Compression Coupling instead. This is a water line with maybe 50 PSI max.
Thanks.

 
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kcm.MN
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PostPosted: Wed Jan 10, 2018 8:59 pm    Post subject: Re: Pipe threading Reply to specific post Reply with quote

Galvanized and black pipe are interchangeable. As for the threader, I haven't a clue.
 
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Janicholson
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PostPosted: Wed Jan 10, 2018 9:07 pm    Post subject: Re: Pipe threading Reply to specific post Reply with quote

A threading tool like that will be fine. I suggest looking into renting one if it will not be used after the job. If nothing else giving it to a handy plumber friend might be an idea. smashing the end and welding it shut is easier!! Jim
 
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Tony in SD
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PostPosted: Wed Jan 10, 2018 9:41 pm    Post subject: Re: Pipe threading Reply to specific post Reply with quote

I bought a used Rigid set at a pawn shop for the same money.
 
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Charles in Aus.
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PostPosted: Wed Jan 10, 2018 11:41 pm    Post subject: Re: Pipe threading Reply to specific post Reply with quote


How long does this work have to last ?

My SIL lives in an old mansion that had a broken gal pipe , so bad that I wouldn't dare even try to thread it . I bought a pipe joiner that was a stainless sleeve with a rubber insert . I cut the end of the broken pipe square then used the joiner to couple it to a short piece of new pipe with an end cap on. This was six odd years ago and it is still holding with not a hint of a leak .
 
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Heyseed
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PostPosted: Thu Jan 11, 2018 12:00 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

Hey Charles, that is a Dresser compression fitting. I had the same idea for a fix. This pipe is under the floor and threading it would be a tricky option. Thanks
 
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RedMF40
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PostPosted: Thu Jan 11, 2018 3:09 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote


Possibly put a flexible coupler to pvc and cap the plastic?
 
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JF in MI
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PostPosted: Thu Jan 11, 2018 4:52 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

I have one that I have used numerous times. They are "so so". Not great but not too bad either.
 
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showcrop
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PostPosted: Thu Jan 11, 2018 4:53 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote


Any chance of removing the stub length back to the last coupling or elbow?
 
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Logan in S.E. Texas
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PostPosted: Thu Jan 11, 2018 5:00 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

There are places that rent tools also. Being it's possible that you will not need it in the future.
 
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Stephen Newell
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PostPosted: Thu Jan 11, 2018 5:19 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

If all you are going to do is cap one pipe you have nothing to loose in buying that pipe threader. It will either work or they will take it back. More than likely it's a good tool but the dies won't last as long as a better brand.
 
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Russ from MN
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PostPosted: Thu Jan 11, 2018 6:42 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

Unless you have other use for the threader I would use a compression fitting, they are widely used in industry and reliable if properly installed.
 
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rustyfarmall
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PostPosted: Thu Jan 11, 2018 7:27 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

CVPost-tony in sd wrote:
(quoted from post at 22:41:22 01/10/1Cool I bought a used Rigid set at a pawn shop for the same money.


I bought the Ridgid set at an auction. 1/2" up to 2" dies. It works very well, but a pipe wrench is also needed to keep the pipe from turning.
 
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Steve@Advance
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PostPosted: Thu Jan 11, 2018 7:48 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

I would suggest a dresser coupling.

Then plug the other end of the coupling with a threaded nipple and cap.

To be safe, nail a block across the capped end. Sometimes if there is water hammer, or the rubber seals relax over time, they can come off if not trapped.
Dresser Coupling

 
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Steve@Advance
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PostPosted: Thu Jan 11, 2018 7:50 am    Post subject: Re: Pipe threading Reply to specific post Reply with quote

PS, another reason for the coupling, the pipe may be too corroded to take a thread. Threading is a pretty forceful operation, could break something, start another leak down stream.
 
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