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Posted: Sun Nov 30, 2008 7:45 pm
by Siopllan
A 450mm diameter plastic inspection chamber (110mm pipes) has been used to connect a new drain serving a water closet, basin and shower to the existing drain. The discharge from the new drain is causing splashback resulting in the deposit of solids on the unused channels. Is there any way of minimising the splash / resultant fouling.
Posted: Sun Nov 30, 2008 7:56 pm
by msh paving
hi, is the manhole close to the soil stack it comes down from if so you need to move it to one side to slowdown the flow
,if its comming down from upstairs there is alot off pressure behind it so manhole needs to be about 1 metre away not straight infront off soil stack that should stop it going over the channel 
Posted: Sun Nov 30, 2008 9:13 pm
by Mikey_C
There is a minimum distance requirement in building regs for the chamber from the bottom of the soil stack I think 750mm, if you have this you should be getting any "cross contamination", however lifting the lid every once in while and having a washdown with is no great hardship and according to my dad "one the pleasures of home ownership"!
Posted: Sun Nov 30, 2008 9:30 pm
by lutonlagerlout
without resiting the IC the answer is no
regular maintenance is the key to it
most ICs that i see have various deposits of loo roll etc in dead spots,its not the end of the world if its not blocking owt
LLL
Posted: Mon Dec 01, 2008 5:50 am
by seanandruby
hopefully you used the main low channel to connect up to maintain the flow. as long as it is flowing it will be ok. as lll says reguler maintenence will keep it flowing as long as the s**** is getting away.
Posted: Mon Dec 01, 2008 6:21 pm
by flowjoe
There are a couple of ways of sorting this out but as usual it will cost.
As the lads say you can re-site the chamber, if there is enough room between the chamber and the stack you could put in a couple of bends to slow down the flow before it hits the chamber.
They make a chamber base with inlets on one side and a sheer wall on the other so that any solids fall back into the channel pipe, and we have in that past formed a sheer wall on the oposite side of the inlet using fibre glass patches that we repair drains with.
Would need to see the site/pictures to confirm the cheapest option though.
HTH
Hope this helps
Posted: Tue Dec 02, 2008 9:04 pm
by Siopllan
Thanks for all your suggestions.
The chamber was installed by a builder approx 9 months ago; he promised to return and sort out the fouling but ...... The work was subject to Building Control inspection but was passed before the new bathroom fittings were installed. The main channel is used for the existing soilpipe; the new drain (approx 3m) feeds in from the side - this serves the new downstairs bathroom. How would the fibre-glass sheer wall be fixed in place?
Regards
Posted: Wed Dec 03, 2008 7:04 pm
by flowjoe
We install fibre glass liners inside drains to repair leaks, fractures etc......
We also use fibre glass to seal manholes/chambers, sticks like you know what to an army blanket.
If you are Manchester/Middleton PM me and i may be able to take a look in passing.