Check local codes before installing plastic supply piping; many building codes do not permit it for interior use.
CPVC and other types of plastic pipe are often used for irrigation systems and other outdoor work. Because plastic pipe can be broken when hit, some codes allow it only for underground installations and require metal pipe above ground.
Often rigid plastic supply pipe is used with flexible tubing such as PEX, both for outdoor and interior installations. In a typical irrigation system, rigid pipe is used for long runs and flexible tubing is used for shorter runs leading to sprinkler heads.
About an hour to cut and join five or six pieces of pipe and fittings
Felt-tip marker, PVC pipe cutter or plastic-pipe saw and miter box, deburring tool, groove-joint pliers
Cutting, measuring, cementing
Cut holes behind walls or under floors to clear a path for the supply pipes.
Plastic supply pipe approved by local codes, appropriate primer and cement, damp rag, flexible pipe, compression fittings
Plastic compression tees are ideal for breaking into an existing line where it is difficult to glue a standard tee. Note the distance that the pipe should be inserted into each end of the compression tee -- usually 1/4 inch. Mark the length of the tee and the insertion points (your cut lines).
Turn off the water and drain the system. Use a plastic-pipe saw or other fine-tooth saw to cut the pipe. Deburr the pipe. Slip the nut and rubber gasket onto each end of the pipe. Bend the pipe out slightly to slip the tee into place.