Pitch Fibre Re-Rounding

Pitch Fibre is a very poor quality material that until recent years meant a full blown excavation if it was to be renewed, however there are now No Dig methods on the market to minimise the disruption.

As the image to the right shows the inside of the pipe work delaminates and blisters causing large lumps to occur usually in the lower half of the pipe, unfortunately the poor structural strength of the product and the non-existant pipe bedding method employed on installation usually means that the top half of the pipe is pushed down and the same time until a complete failure occurs.

Pipe Re-Rounding is not dissimilar to pipe bursting in as much as a head or pig is winched through the system, instead of splitting the pipe a head the same internal diameter as the host pipe is used in order to reshape and return the deformed pipe work to its original state, a CIPP liner is then installed to maintain the structural integrity of the pipe work.

We have renewed several systems using pipe bursting rigs in the past but there are hand operated winches on the market, it really comes down to the severity of the deformity and blistering as to what kind of force is required to re-round the pipe work

The works can be undertaken from excavations or existing chambers however branch lines to gullies and toilet connection will normally require excavation and repair.

There are numerous specialist lining and re-rounding contractors around and a couple of suppliers who will be happy to sell you the equipment required, if your looking to do a one off job there are also a couple of specialist hire companies.