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Old 05-22-2012, 09:04 AM   #1
Chaz
 
Join Date: Feb 2010
Location: Northwoods of Maine
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Joining 1/4" walled poly pipe IDEAS NEEDED!!


Lads,

I need a new method of joining EXTREMELY heavy-walled black poly roll pipe. It is 2" ID, and 2.5" OD. It exceeds schedule 80 poly pipe! For some unknow reason, this ridiculous overkill was used in an irrigation system I maintain.

Here's the problem. There are probably 30 or 40 straight or tee joints in the system. The joints are over plastic barb fittings, secured with 2 SS band clamps. Most of them leak. It is impossible for a band clamp to have any effect on the pipe without heating it severely. It's simply not made for band clamps.

Even just heating the pipe, then slipping it onto the fitting, can distort the fitting. If nothing else, it simply flattens the barbs and they make zero impression into the pipe. As near as I can figure, this pipe is used for municiple applications, probably with manufacturer specific joints.
We could probably make due with brass fittings and heat, and we could upgrade the band clamps to some wider bands with two nuts and bolts. However, we cannot find combinations such as 2-1/2" x 2" tees. We would have to make them with three barbed x thread nipples, a threaded tee, a reducer, and the aformentioned clamps, for about $130!!

Any other ideas?? Is there a simple flex-type joint, rated for pressure, that we could slip OVER the pipe, then step it down to the 2" plastic barb or standard duty irrigation pipe? A Fernco would be perfect for us, except there is about 50 PSI on the line.

Thanks

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