: Hi, : Home has an abundance of water coming into the crawl space. There is an outlet hole with an obstructed outlet pipe due to roots penetrating the pipe. I would like to replace the pipe with a 4 diameter pipe that will not leak. The pipe will need to be underground for about 20 feet and be attached without leakage to the foundation wall . Would PCV or CPVC be good for this application? What would be best to last many years without trouble? : Thank you for reading this request. : Leon Max PowellLeon, I would go with the PVC pipe. regards, Terry Love