Rigid pipe is cut with a
is glued together with solvent cement. Most codes specify that pipe
and fittings of different plastics cannot be mixed in the same system.
The materials require different cements and expand at different rates.
A typical do-it-yourself project, such as hooking up a new sink, might
use rigid CPVC (chlorinated polyvinyl chloride) pipes for the hot and
cold water-supply lines and rigid PVC (polyvinyl chloride) for the drain
Flexible pipe is joined with compression fittings
rather than solvent cements. The most common flexible pipe, PB (polybuty-lene),
is used for both hot and cold interior and exterior water supply systems.
It has excellent heat resistance and is very strong, but is generally
more expensive than rigid pipe.
Flexible pipe is particularly suited to remodeling jobs
where pipes have to be snaked through walls, floors and ceilings, and
to lawn irrigation systems. Although this pipe is flexible, it can kink
and should be bent only into gentle curves. It is rigid enough to support
itself on fairly long runs but it is best to use extra supports.
Basic Techniques | What You
Will Need >>