memory man":3cfrcxyg said:
Pogleswoody":3cfrcxyg said:
memory man":3cfrcxyg said:
signalspast":3cfrcxyg said:
Anybody who has had the dubious pleasure of smelling the old grandstand toilets over the years would realise there is drainage problems somewhere in the system. There is probably decades of tish to unblock somewhere
I don't know the history of this alleged drainage problem but I would think it is highly likely that any drainage system installed in the immediate post-war period would struggle to be fit for purpose more than 60 years later. When older buildings undergo significant updating it is not unusual to find emergent problems with the supporting infrastructure.
two words: Pitch Fibre :shock:
:lol:
Ah, sold plenty of that when I worked for CE Curtis at Laira Bridge 1964/1965 and loads of tarred gaskin too. It was quite a change from the traditional 4" collared clay pipes which in those days were glazed inside and out.
For those of us with a lack of pitch fibre knowledge. :lol:
"Pitch fibre drainage pipes were introduced in the 1940s, and used extensively until the 1970s. They were thought at the time to be the latest wonder material, being cheaper than fired clay pipes, and also lightweight and easy to handle. They were made from wood fibre impregnated with coal tar, and have performed adequately when dealing with normal waste water. However, they have been found to react badly when subjected to large quantities of hot water, and to oils and fats, which can soften the tar and cause deformation and leaks. The design life of pitch fibre pipes was recently estimated to be about 40 years, meaning that some will have reached the end of their life expectancy. In the worst cases, they can collapse, blocking the drain run.
The small delaminations that you describe would seem to indicate that your own drains are not badly affected, though, and may have a good few years life in them. You have not said why you had the CCTV drain survey undertaken, however, and if it was because you have already had a blockage, then it may be wise to consider remedial action. Clearly, digging a trench and laying a new drain would be the most professional job, but since this would involve excavating and re-laying your concrete drive, it will be expensive and disruptive. It might be worth investigating whether the old drain runs could be abandoned, and new drains laid alongside the drive.
If this is not possible, then drain lining has a good reputation, and the price you have been quoted sounds reasonable. Delaminated and collapsed pitch-fibre pipes can be forced back into shape with a re-rounding tool dragged through them, and the resin-impregnated polyester textile liner is designed to be strong enough to withstand further movement. Before you do anything, it might also be worth checking with your insurer, as there have been cases where insurers have paid for drain renewal under "accidental damage" claims"
https://www.telegraph.co.uk/lifestyle/i ... drain.html
