|
Throughout the 1960's pitch fibre pipework was commonly used because it was ideal due to it being inexpensive and easier to handle than more traditional clay pipes. |
|
|
|
Pitch Fibre is made up of wood cellulose fibre impregnated with a carefully refined inert coal tar pitch , under vacuum and pressure (about 25% fibre to 75% pitch by weight) |
|
|
|
While Pitch Fibre Pipework was suitable for both drains and sewers, it was not considerable for drains running large amounts of hot water or for wastes containing solvents such as fats or petrol. |
|
|
|