OK, this is potentially a dumb question. On the outside of my house there are a couple of pvc pipes coming out. They have a 90° elbow attached to them and point at the ground. What are they for? There ...

A report warning cities against the use of PVC pipes in water systems sparked swift and resounding criticism from the plastics industry, its advocates and at least one leading scientific expert.

NEW: A Uni-Bell PVC Pipe Association official has a rebuttal to the Beyond Plastics report covered in this story. Read the detailed update here. Bennington, Vt.-based Beyond Plastics, a nonprofit ...

Household plumbing systems use PEX for pipes to supply water and carry away sewage. The term PEX stands for "crosslinked polyethylene." PEX piping is manufactured by melting high-density polyethylene ...

A report from a coalition of U.S. environmental advocacy groups has warned of the health risks of PVC plastic and urged public officials against using the material in community drinking water pipes.