15.01 What are common types of underground piping?

The primary underground pipe materials are:

• Fiberglass piping – primary and secondary. There are 2 primary providers of fiberglass pipe in the US: Smith Fiberglass and Ameron

• Flexible double wall plastic piping.. Flexible plastic piping has had a mixed history based on failures associated with some of the earlier versions of the products. There are currently 2 primary providers of flexible plastic piping in the US: EBW (Franklin) and OPW (Environ)

• Steel primary piping with a fiberglass or coated steel containment. The primary providers of these piping systems are Perma-Pipe and Rovanco.