Plastic Water Lines: OK?

by Sherm Turner

Dear Sherm,
I am buying a new house without copper water piping. Instead they are using a pipe called polybutyl. (this word may not be spelled correct) Is this good or bad?
-- New Home Owner

Dear Home Owner,
PVC plastic schedule #40 pipe is okay for drainage, waste, and vents. I will not recommend installing plastic water lines inside new houses because of its lack of durability and because of weather considerations. For the record I will only recommend copper water lines.

Sherm Turner is a Master Plumber with over 30 years experience. "Ask the Master Plumber" is his way of encouraging people to help the disabled, elderly, handicapped and children. If you have a question for Sherm, email it to him at:

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