Glueing on to underground soil pipe

[Rybo_1]

Hi all,

Wondering if any of you have opinions of glueing soil fittings directly on to underground soil pipe. I have done it many times with no problems but today I did a job where I glued in a low level boss pipe onto red pipe. The builder spotted it and mentioned that you can't do that. Is he right?

 

[Destroyer2813]

I've also done it many times my understanding is the difference is the u/g isn't u/v rated

 

[Ray Stafford]

I don't think that you are supposed to glue underground drain.

There is also some UG pipe that has a bubbly structure, like an aero bar. I think if you put solvent on that, it would collapse completely.

 

[Ermintrude]

No you cannot. It prevents movement. You must use correctly lubricated sleeve.

 

[Ermintrude]

In the ground the pipe is surrounded by a constant temp heat sync with huge thermal momentum, chuck hot water down it and the pipe will expand and move on inside as the heat is rapidly absorbed by thermal mass of earth , pipe wall has a huge thermal gradient. So needs to move. When in air it's very different. Below ground 4" almost the same just not uv stable. 100mm up to 225mm ultra rib different plastic

 

[mfgs]

Polypipe say it is fine to glue on to their underground pipe.

 

[Ermintrude]

Think that's gluing above slab. Building spec and sewer / structural design should call for a stub above rest bend terminating at FFL.