How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
What type of water supply and drain (DWV) pipes are commonly used today?
Sunday, April 28, 2019
CPVC is the most popular water supply piping, with PEX gaining market share, and PVC is the dominant drain (DWV) pipe.
Copper is still used, but very rarely.
CPVC (cream-color plastic) is the most popular water supply pipe.
PEX (red, blue, white, or black flexible plastic) often installed with a central manifold (shown above) and especially popular for repiping older homes.
PVC (white plastic) used for water service piping to house (not inside), and other exterior locations.
ABS (black plastic) continues to be used, more popular in western states.
PVC (white plastic) is most the common DWV pipe.
See our blog post for What do the ABS, PVC, CPVC, PB, and PEX plumbing pipe names mean? for the chemical composition behind all those acronyms. Also, you might want to read What is the difference between water pipe and sewage (waste) pipe? and Are plastic pipes (PVC, CPVC, and PEX) safe for drinking water?
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Here’s links to a collection of our other blog posts about PLUMBING PIPES:
Cast Iron Pipe
Orangeburg (bituminous fiber) Pipe
PB (Polybutylene) Pipe
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