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Old 09-04-2007, 10:58 AM   #1
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General Pipe Question...


I'm a strick DIY hence most of all the materials I buy can be had at HD or other big box home improvement stores...

I was at a friends place who's doing a whole house renovation (he hired pros) and noticed that the plumber used a lot of iron pipes for roughing in some of the plumbing fixtures. So I see stub outs to tub spigot and shower fixtures that uses iron pipes. They are threaded and too long, but the plumber will come and cut down and re-thread once the tiles works, etc. are done around it...

My questions are...

1) Is this common practice?
2) How do they re-thread a small 3/4 inch iron pipe once it cut to length? I thought the tap/die tools are pretty big?

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Old 09-04-2007, 12:04 PM   #2
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General Pipe Question...


I am not a plumber... but would be surprise people use iron pipes rather than copper nowadays..... if it is for the sake of saving money.... that's too bad ... iron pipe one thing I realize... it rusts... I may be wrong though...

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Old 09-04-2007, 12:22 PM   #3
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General Pipe Question...


I'm not a plumber either, but cast iron is usually used because it's quieter than plastic or copper pipe. The sound of the water doesn't travel through it. And given copper prices right now, it may be on par with copper pipe pricewise.
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Old 09-04-2007, 01:03 PM   #4
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General Pipe Question...


I'm not a pro plumber, but I've been DIYing it for more than 50 years.
If it were me, I would tell your friend to jerk a knot in that so-called plumber for installing obsolete galvanized pipe anywhere for any reason.
He should refuse it!
Mike
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Old 09-04-2007, 05:40 PM   #5
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General Pipe Question...


Quote:
Originally Posted by slakker View Post
I'm a strick DIY hence most of all the materials I buy can be had at HD or other big box home improvement stores...

I was at a friends place who's doing a whole house renovation (he hired pros) and noticed that the plumber used a lot of iron pipes for roughing in some of the plumbing fixtures. So I see stub outs to tub spigot and shower fixtures that uses iron pipes. They are threaded and too long, but the plumber will come and cut down and re-thread once the tiles works, etc. are done around it...

My questions are...

1) Is this common practice?
2) How do they re-thread a small 3/4 inch iron pipe once it cut to length? I thought the tap/die tools are pretty big?
Is the whole thing piped with galvanized? I highly doubt it. Galvanized pipe isn't cheap, and the labor involved would make it more expensive then copper. I'll bet their is copper pipe behind the walls and you're just looking at the stub outs. Those nipples you see sticking out of the wall are threaded into brass taped tees. When you stub out you intentionally use nipples that are too long as they don't get sheet rocked or tiled over, and you can't be sure of the exact length needed until the wall is finished, you don't use brass for the temporary nipples simply because of the cost. The plumber is going to come over, shut off the water, unscrew those nipples and replace them with appropriate sized nipples usually brass or chrome.


Cast iron is perfectly fine for drain lines, some places (NYC for example) even require it. If he's using galvanized for drain lines he's doing something wrong though.

Last edited by Marlin; 09-04-2007 at 05:44 PM.
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Old 09-05-2007, 01:48 AM   #6
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General Pipe Question...


Thanks for the posts... it definitely is NOT all iron... the original house was all copper, the new runs and extensions are done in pex. Only the stub outs are iron. I'll keep an eye out as to what the plumber does, but I know from my own experience, the final length of pipe is hard to guage with drywall, tile and other surfaces. So the thing to look out for is to make sure the plumber replaces the temp iron with brass in the final work...

But are the brass tubes cut to custom length and threaded on site?
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Old 09-05-2007, 05:36 AM   #7
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General Pipe Question...


Pieces 6in and smaller are typically bought from the store that way, and sizes from 1.5 (close) to 6in in half inch intervals are stocked on the trucks. The time involved with threading small nipples doesn't make it worth it to sit there and do it yourself.
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Old 09-06-2007, 12:45 AM   #8
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General Pipe Question...


I ran into the plumber today (I'm there doing the floor for my friend.. different story)...

I had a chance to talk to him and he confirmed exactly that... when he comes back in to finish, he'll replace with the brass tubing and he has them in his truck in 1/2 in increments...

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