Page 1 of 1
Posted: Wed Nov 24, 2010 5:33 pm
by Mac
In our small estate we have 4 in pitch fibre pipes for foul drainage. A 10 m length under a lawn area needs replacing because it undulates and is flattened, probably due to subsidence apparent on the surface. This pipe serves six 2/3-bed houses.
Which type of pipe should we specify? Clay or plastic? 4 in or 6 in (or whatever the metric is)?
Cheers, Mac
Posted: Wed Nov 24, 2010 5:45 pm
by Tony McC
Probably 110mm plastic. If it's laid with 150mm granular material all around, it can cope pretty well with minor ground movement.
Posted: Wed Nov 24, 2010 5:57 pm
by GB_Groundworks
current reg say you are not allowed to change diameter in the run only in inspection chambers but you should be fine on a repair if you are worried about it happening again specify ultra rib 110mm and as tony say make sure its bedded correctly
Posted: Wed Nov 24, 2010 6:16 pm
by lutonlagerlout
we have found pitch fibre before all egg shaped
biggest problem is connecting your nice round 110 mm pipes to the egg shaped pitch fibre
LLL
Posted: Wed Nov 24, 2010 6:55 pm
by flowjoe
Pitch fibre is known for becoming mishaped and blistered regardless of ground movement, a very poor product all round.
Speak to your insurers, the ombudsman ruled some time back that insurers should be picking up the bill for this kind of work.
Posted: Thu Nov 25, 2010 9:12 am
by Tony McC
....but at the time, before the advent of uPVC pipes, pitch fibre was seen as revolutionary because is was cheap and light and easy to cut...all the things salt-glazed clayware wasn't.
The easiest way to replace a 10m run, bearing in mind the deformation that LLL mentions, is to build a new IC at each end, but it would be a better job to replace the entire run, rather than do it piecemeal.
Posted: Thu Nov 25, 2010 7:53 pm
by rab1
showing your age there boss 