Claim on utube and a pipe mfr's website that most modern residential drainage in the ground - lateral sewers etc. - is either PVC or ABS.

Their reasoning is that CI no-hub fittings are more prone to root access than plastic gasket fittings and plastic pipe.
I could name the Mfr. of some commonly used PVC Gasketed sewer fittings but dont know if thats allowed?

Is solvent weld (gluing) allowed underground in anyones regional codes?

the reason PVC is used instead of cast iron is because it is cheaper and faster, not because of root infiltration.
gasketed PVC sewer pipe is thinner wall than regular schedule 40 PVC. it is not allow to be used inside the house under my code whether it is glue, gasketed or welded.

quote; their reasoning is that CI no-hub fittings are more prone to root access than plastic gasket fittings and plastic pipe.

Back in the 50's the Orangeburg pipe manufacturers said that THEIR material was superior to cast iron because the tar in the joints would repel the root. We know how that worked out, and the cast iron institute had a field day making videos of all the various way that pipe would fail. Gasketed joints can suffer from root infiltration, because any time there is a "mechanical" connection, fine roots can penetrate it and once the fine roots are in the big one come right behind them. The "thin" SDR gasketed PVC is almost worthless to install.

Thank you both for the replies.

So, do you typically use solvent welded PVC for laterals?
Is it the cheapest option?
What about ground movement?

quote; So, do you typically use solvent welded PVC for laterals?

WE NEVER use PVC, only ABS in this area. The only PVC is the cheap SDR used by contractors trying to save money

Is it the cheapest option?

NO! But it is the "best" option, other than cast iron

What about ground movement?

If the ground moves ANYTHING buried in it is going to move with it.

Thanks hj,

Ref. ground movement; wasn't it one of the main reasons for abandoning Sand and Cement joins with salt glaze and clay pipe?
And dont Fernco and others market no-hubs with claims for their adaptability to shifting ground conditions?

How long has your code allowed you to glue drainage groundwork?

quote; How long has your code allowed you to glue drainage groundwork?

Ever since they allowed plastic pipes. Cement clay tile joints were "abandoned" when rubber seals were developed, but their disadvantage had nothing to do with "ground movement", it was because they provided almost NO resistance to root intrusion. In face, I once saw an installer cementing the upper 3/4 of the joint. When I asked him, "WHY?", he said, "So the ground water will be able to get IN TO the pipe".