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White pvc couplings question

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dr.sportster

05-08-2006 15:45:39




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When purchasing some pipe for a pool repair I picked up two types of couplings:hub x hub, and slip.The fittings both fit on the pipe snugly in the store but the slips are longer.The pipe will be buried and I dont want any leaks. Which is the correct type? Thank you.




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PVC..John,PA

05-09-2006 04:29:16




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 Re: White pvc couplings question in reply to dr.sportster, 05-08-2006 15:45:39  
We use 4 in. PVC Sched. 40 for drain lines in some refrigeration equip. After about 20 yrs. some of the pipes started to come apart at the glue joints.

Our repair was to use glue that was never frozen while in a plumbers truck in the winter time.

After reglueing the fittings and pipe together, I always drill a 1/4 in. hole thru the collar of the coupling and just into the 4 in pipe without going thru the wall of the pipe. Then I insert a 1/4 in stainless steel roll pin in the hole.

Hopefully this repair which has become my standard procedure even with new work will last at least my lifetime.

Seems as though we build new school buildings here because the pipes came apart in the old buildings.

John,PA

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TimWafer

05-08-2006 16:16:34




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 Re: White pvc couplings question in reply to dr.sportster, 05-08-2006 15:45:39  
I think by �slip coupling� your referring to a repair coupling. Its designed so you can slide it up the pipe and back over the joint in a situation where you cant move the pipes apart to use a regular coupling. If that�s the problem use the repair one, if not use a regular coupling to insure the coupling is centered on the joint and both ends are inserted to their full depth.
Tim



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dr.sportster

05-09-2006 14:12:30




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 Re: White pvc couplings question in reply to TimWafer, 05-08-2006 16:16:34  
Thats what we call a slip coulpling for electrical pvc.You make it with a file and slide it down the pipe for repair jobs but both these fit snug on the pipe the only difference is the ones called slip are longer so the pipe goes in to a greater depth.Im thinking maybe Home Depot just had them dumped into the wrong box.The ones called hubXhub the wife got at Lowes and are shorter.Ill just cap it and pressure test when Im done.I havent seen an electrical pvc job not filled with water yet so Im worrying.Thanks Gentlemen.

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Nat

05-08-2006 16:42:15




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 Re: White pvc couplings question in reply to TimWafer, 05-08-2006 16:16:34  
In either case make sure you use schedule 40 fittings, not drain fittings. The glue surface on sch 40 1 1/2" fittings are 1 1/4" long where-as drain fittings have a glue surface that is 5/8" long. Here we call the fittings that you glue as "slip fittings" and hub as fittings that you bolt together, so I'm not sure what you are refering to, but make sure they are sch 40 either way. HTH, later, Nat

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