Best under slab sewer pipe for new house?

[swlred]

What is the most durable, longest lasting type of sewer drain pipe for under a concrete slab? This for a new house with a basement, currently under construction.

We are considering solid core schedule 40 PVC (not foam core), but wondering if there is a better option. Schedule 80 PVC? Cast iron? Something else? Cost is not a major factor. The main concern is longevity.

Due to construction details, repairing leaks under the slab will be challenging and expensive, so I'm looking for a pipe that can last for the life of the home with minimal risk of leaks or other problems (50 to 100+ years).

 

[James Henry]

Never use any kind of metal pipe. If you want to use schedule 80 PVC, go for it. The most important thing is that it is installed correctly and glued properly and it doesn't get moved while backfilling the dirt or when pouring the concrete. You need to have someone trustworthy to oversee the job. Period.

 

[Sponsor]

 

[James Henry]

It looks like I made a mistake, there may not be any sanitary fittings for schedule 80 pipe. Everything else still stands.

 

[swlred]

Thanks! Schedule 40 might be the way to go.

 

[Jeff H Young]

Yes Sch40 the most durable. As far as I know its still not unheard of on public sewers to run Clay but for the life of me I cant see running clay .
Id stay away from thin wall sewer pipe . and run DWV pipe and fittings. We have always run sch 40 ABS foam core . but heck go solid core on the pvc for double the price its better I guess 10 bucks or so a foot vs 5 . dont run sdr35 my opinion