Pitch Fibre Pipes!
Pitch Fibre Pipes Pitch fibre pipes were mostly used from the 1950s to the early 1970s. Pitch fibre is made of wood cellulose fibre impregnated with coal tar pitch, under vacuum and pressure. These pipes are susceptible to delamination of their inner surface. They are also prone to collapse under applied pressure such as driveways. … Read More »






