Need to couple PVC pipe internally

[forensicdoc]

I need to couple two pieces of 3" PVC together; however, I do not have the space to use a traditional external coupling. Any recommendations on how I could couple these two pieces internally? I know it will narrow the diameter of the pipe (that's fine) and it is a low pressure system, so I am not worried about leaks.

Thanks!

 

[lakee911]

As far as I know, the only internal couplings that exist are for 4" and larger. I think it would also depend on what schedule pipes you're using. Google internal pvc coupling.

Jason

 

[shyland83]

plumbing supply has them in 1" 1.5" and 2". i have to imagine someone has them in 3"

 

[jefnalyssa]

The only thing I can think off is to reduce the pipe. Then use a traditional coupling.

 

[BeanAnimal]

http://www.bryantplastics.com/OSPDuct/utility.htm

 

[lakee911]

I saw that Bean. He needs a 3" and I think that maybe those are for electrical conduit too.

Jason

 

[lakee911]

<a href=showthread.php?s=&postid=11590786#post11590786 target=_blank>Originally posted</a> by shyland83
plumbing supply has them in 1" 1.5" and 2". i have to imagine someone has them in 3"

Ya, I would call these guys over at Plumbing Supply and see if a 3" exists. http://www.plumbingsupply.com/pvc.html

Why do you need it? Can you cut out a large section and replace the pipe with standard couplers?

 

[BeanAnimal]

Or replace the section with flex?

 

[forensicdoc]

Unfortunately, the pipe I am looking to tie into is imbedded in concrete, so there is no way to get at it externally, only internally. I will check on the leads you all have provided. Thanks again!

 

[wife no likey]

think this is what you're looking for:

http://www.magicplastics.com/vnf_magic_pext.htm

 

[BeanAnimal]

Nice find!

 

[wife no likey]

yeah I saw those awhile ago on some Koi vendor site. .don't think that they have the 3" though.

http://www.lagunakoi.com/prod152.html

 

[BeanAnimal]

You could use smaller diameter pipe, extending it into the existing pipe 4" or so. You could fill the remaining gap with a plastic epoxy.

Can you provide any more details about the setup. Is this for tank water, waster water, rain water? Pressure?

 

[maddmatt02]

I was gonna say, get some 2.5" ABS or some thick 2.5" PVC and see if the O.D. is 3" and do it that way, Ive done a few things like this but it was with smaller stuff like 3/4 and 1"

 

[wife no likey]

here's somebody that stocks the 3"

http://www.spasandmore.com/html/Magicmend-Pipe-extender-fitting-for-hot-tub-spa-leak-repairs.html

 

[lakee911]

Hey, there you go. That looks like it would work. Else chip away the concrete around the outside carefully without destroying the pipe.

 

[forensicdoc]

The pipe extender looks like it would work fine. In answer to an above question, this is for rain water. I need to divert some water during heavy rains that is coming out in an unacceptable location. I also thought about using 2 1/2 inch pipe and gluing it into place. Since it is not a pressurized system and a bit of water leaking will not be a problem, I thought the pipe might work.

Thanks again to everyone for their input.

 

[BeanAnimal]

No problem... let us know how it works out.

 

[adnup]

I know its not the best way but I've glued two peices together end to end. Sand them smooth prime and glue. I made some quick 45's and 90's that have worked great. I use the 90's as drain inlets inside a tank(no worries if it failed) but a 45 as the drain into a sump, it was water tight and never failed after a year of use. I just took that tank down and it was still strong.

I repeat I know its not the best way to do it but it was late and I wasnt running to HD for fittings and they worked great.