The Brew Cabin

Posted: **Fri Oct 02, 2009 2:57 pm**

hi all, thanks for the help with the previous post all sorted.

extension is having a new loo installed.

the underground pipe for that will run along side of the house
then connect at roughly 90degrees into an inspection chamber, or thats the idea.

anyhow, we were going to use one of the smaller size inspection chambers that are approx 300mm wide, but i have read that they can only be used down to 600mm is that correct?

the bottom of the exisiting soil pipe is 700mm, so it will need to be at least 700mm deep.

also are we allowed to put bends in the new pipe to align it up to the exisitng pipe and new inspection chamber.

what do you think of the inspection chambers that have flexible connections?
what supplier would you use?

we have seperate foul and rainwater and the pipes are 110 plastic.

Posted: **Fri Oct 02, 2009 3:25 pm**

most manufacturers will have and IC that takes 110mm upvc drainage, go for whatever is the most readily available as they all do the same job...pretty much. You will need rubber sealing rings between each section of the turret as it is for foul water. Sometimes they are part of the turret section, sometimes they are separate.

at 700mm deep a 450mm diameter IC would be better just incase there are any future drainage problems, and bigger IC has more outlets incase you want to extend further and any more foul connections get plumbed in.

Bends incoming the IC - depends how sharp. Before the pipe enters the IC you will need a short length of pipe approx 600mm long called a rocker pipe to allow for any movement in the pipes and IC once installed. Small amounts of bend can be adjusted in the rocker pipes. Rockers also to the existing soil pipe in and out of the IC.

Also if the incoming pipe serves an upstairs toilet then a fairly slow bend can help to slow things down as they flow into the IC meaning less need to clean the chamber out, as "Stuff" does tend to clog up where there are unused outlets.

Seek advice of building inspector. At the end of the day if they are not happy 110mm upvc and fittings is not dear and is easy enough to tweak about and make minor changes.

Hope this helps.

Posted: **Sat Oct 03, 2009 8:01 am**

hi and thanks for the reply, will go for the bigger ic, ie a 450mm as i have read that the smaller (300mm) ones can only be used down to 600.
i assume thta building control are sticklers for that 600mm rule.

Posted: **Sat Oct 03, 2009 8:29 am**

Pretty much so, yes. Covers are easy to lift and check - so do it properly.

Posted: **Sat Oct 03, 2009 9:12 am**

hi, he will want to check it before we back fill so will do it right first time,
i assume that the lowevest invert is taken as the lowest part of the pipe.

one last question, loo will be in a first floor bathroom, then underground pipe will be a 6m run to the ic, would you put a rodding point into the 6m run. the guy fitting the soil pipe says he will put one in the base of the soil pipe.

just thinking about the long term

The Brew Cabin

Connecting to exisiting foul water drain - Connecting to exisiting foul water drain