PEX – Polyethylene cross-linked pipe (PEX) is an affordable plastic tubing that’s popular for water supply lines because it doesn’t leach traces of rust or corrosion into the water as some other types of pipes (for instance, galvanized) have been known to do.

PVC – Pipe made from polyvinyl chloride (PVC) is often used in a home’s sewage system because of its durability.

ABS – Acrylonitrile butadiene styrene (ABS) black pipe commonly found in sinks, tubs, or toilet drains.

Copper – Copper pipe is found in sinks, showers, tubs, and other fixtures. It is a favorite for water supply lines because the metal does not affect water quality.

Galvanized – Found in many older homes, galvanized pipe was once widely used, but is no longer used in new construction. Over time, this type of pipe rusts and causes pressure issues.

Cast Iron – Used for more than a century for home plumbing, cast iron pipes were commonly used in houses built before 1970.