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#178226 - 05/26/08 01:02 PM Threading 2 1/2" Gal pipe.
petey_c Offline
Member
Registered: 01/30/05
Posts: 62
Loc: Miller Place, NY USA
I'm preparing to do a service that requires a 16 - 17' mast(The property slopes away from the street and the POCO's lines are on the opposite side. The meter pan's location will be on the back side of the garage peak, so I'll need to project far enough above that so I'll be able to have a 18" drip loop.). I have a 7' piece of 2 1/2" gal and need to get that threaded to be used as the bottom piece. I spoke to a master plumber and he said that most plumbers only go as far as 2" pipe. The orange box store said the same. Any suggestions? pete
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#178229 - 05/26/08 01:32 PM Re: Threading 2 1/2" Gal pipe. [Re: petey_c]
BryanInBalt Offline
Member
Registered: 05/11/07
Posts: 47
Loc: Baltimore
You need to get up close and personal with someone at a company that regularly works with larger size pipe and has the equipment to thread that pipe.

This is a good contact to develop anyway for all sorts of reasons (like this) and the occasional smaller job a regular customer of theirs needs but they don't want to mobilize for.
May be right up your alley.
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Design-Build isn't supposed to mean design *as* you build.
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#178231 - 05/26/08 01:43 PM Re: Threading 2 1/2" Gal pipe. [Re: BryanInBalt]
renosteinke Offline
Cat Servant
Member
Registered: 01/22/05
Posts: 5316
Loc: Blue Collar Country
Humbug!

I recently needed some 4" threaded pipe .... the plumbing supply house had no problem providing me with the pipe I asked for, cut to length, and threaded. Since pipe commonly comes in 20ft lengths, they ought to be able to make a piece for your mast - if you can transport it.

BTW, it may be a fine point, but I don't think a service mast need be made of 'listed' material. Conduit, yes ... but the code is silent as to the mast.

Failing a friendly supply house, any machine shop with an "engine lathe" ought to be able to cut the threads into anything up to 4" OD.
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#178235 - 05/26/08 02:56 PM Re: Threading 2 1/2" Gal pipe. [Re: petey_c]
togol Offline
Member
Registered: 09/15/05
Posts: 421
Loc: NW In. USA
why not just put the bald end on the top?
or are you concerned about the coupling up there ?
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#178240 - 05/26/08 04:21 PM Re: Threading 2 1/2" Gal pipe. [Re: renosteinke]
walrus Offline
Member
Registered: 07/25/02
Posts: 680
Loc: Bangor Me. USA
Originally Posted By renosteinke
, cut to length, and threaded. Since pipe commonly comes in 20ft lengths,


Pipe comes in 21 ft lengths
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#178241 - 05/26/08 04:22 PM Re: Threading 2 1/2" Gal pipe. [Re: togol]
GA76JW Offline
Member
Registered: 03/20/04
Posts: 193
Loc: Suwanee, GA USA
Originally Posted By togol
why not just put the bald end on the top?
or are you concerned about the coupling up there ?


There's always threadless couplings and connectors too. Yes they are a little more expensive, but may be worth the cost in this case.
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"If common sense was common, everyone would have it"-not sure, someone here

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#178242 - 05/26/08 04:23 PM Re: Threading 2 1/2" Gal pipe. [Re: walrus]
renosteinke Offline
Cat Servant
Member
Registered: 01/22/05
Posts: 5316
Loc: Blue Collar Country
Thanks for the correction laugh
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#178243 - 05/26/08 05:01 PM Re: Threading 2 1/2" Gal pipe. [Re: renosteinke]
macmikeman Offline
Member
Registered: 07/16/02
Posts: 717
Loc: Honolulu, Hawaii
Rigid makes an attachment gear for threading 2-1/2 thru 4" galvanized rigid. Trade slang is I think hog leg. I just now walked into my shop to look at the model number. 4P-J . You use it in conjunction with a Rigid 300 and a porta pony threader. A new one would be way too pricey if you only are using it this one time. Some hardware stores have a stand up threader that threads up to 4" for threading pipe they sell. Call around.
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#178244 - 05/26/08 05:38 PM Re: Threading 2 1/2" Gal pipe. [Re: macmikeman]
petey_c Offline
Member
Registered: 01/30/05
Posts: 62
Loc: Miller Place, NY USA
My first reaction was to put the "bald" end up top, but the AHJ wants the smaller length closer to the meter pan. I believe that his reasoning is that you'll have more meat attached to the house before it goes through the roof. Two clamps and then through the roof (in the 7' of pipe) vs. 1 clamp on the 3' (leaving the 3' beyond the roof out of these calc). Also, I guess since the coupling is further down you'd have less strain on it. It's an 84' drop from the pole to the house. Thanks for all the suggestions.
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#178245 - 05/26/08 05:39 PM Re: Threading 2 1/2" Gal pipe. [Re: macmikeman]
maintenanceguy Offline
Member
Registered: 12/02/01
Posts: 300
Loc: Southern NJ, USA
Call around, threading dies up to 4" are pretty common on threading machines. I know that both plumbing suppliers I regularly deal with have them. I'm sure someone in your area does too.
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