On 29/04/2015 14:41, Jethro_uk wrote:
On Wed, 29 Apr 2015 14:37:28 +0100, James Harris wrote:

Anyone know of a plastic sleeve product which will go inside an old clay
soil pipe? As far as I can tell the old pipe has about a 4" internal
diameter.

Details: I have come across an old soil pipe which is very badly cracked
- at least to the parts that I can see - and has small roots growing in
to it through the cracks. The ideal thing would be to replace it with a
new one but parts of the existing pipe are fairly inaccessible without
going to a lot of extra cost and would require damage to an internal
tiled floor that I may not be able to match with replacement tiles.

So I wondered if it was possible to buy a plastic internal sleeve for
such old pipes. The idea is that the sleeve would support the walls of
the existing pipe, stop water leaking through the cracks, and provide a
good end to join on to the subsequent pipe.

That's the idea. Is there any product for a problem such as this? Unless
it is flexible I would only need a short length - say less than 2 feet.

James

Weren't water companies running some sort of pig down their old ceramic
pipes and lining them with plastic to save the cost of relaying them ?
The ceramic providing the structural strength, and the plastic sealing
any leaks ?

Suggests there's a commercial sector out there ....

I think they do that for the big (12 inches and upwards) cast iron stuff.

Oddly enough I have roots getting into a 4 inch ceramic soil pipe too. I
will be digging it up in the next couple of weeks and may also be trying
to "line" one section (under a large shrub / small tree).