Quote:
Originally Posted by LouisVanDerWright
The biggest benefit of PVC is that, when installed correctly, it is basically a frictionless surface inside meaning that it doesn't catch debris and hair and back up. They still require you use cast iron below grade even if its a smaller (less than 3 floors) residential building and you are allowed to use PVC above grade. This is literally the most moronic thing because below grade is where most sewer backups happen and you have to tear everything out to get at it. Why not allow watertight infinite life plastic below grade too?
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This is my experience as well. At a commercial property my parents own, we've had to replace cast irons pipes leading out to two catch basins in the rear lot near the alley. They were both as old as the building (roughly 45 years) and we had to dig through concrete foundation and asphalt in order to replace them. And of course the city demanded they be replaced with cast iron again. Complete idiocy...