Pointing

Method of repairing a brick sewer or manhole by the application of cement mortar where loss has occurred.

Polyester

Resin formed by condensation of polybasic and monobasic acids with polyhydric alcohols.

Polyethylene

A ductile, durable, virtually inert thermoplastic composed by polymers of ethylene. It is normally a translucent, tough solid. In pipe grade resins, ethylene-hexene copolymers are usually specified with carbon black pigment for weatherability.

Polyolefin

A family of plastic material used to make pipes.

Polypropylene

A type of plastic pipe from the polyolefin family. (abbrev. PP)