"Tim S" wrote in message
...
Tim Lamb coughed up some electrons that declared:

In message , mark
writes

I've to connect a 110mm soil pipe to an existing 4" clay sewer pipe. It
will be near enough at a right angle.

Depth will be about 750mm-900mm.


To make it roddable I will need an inspection chamber.
There is obviously a relationship between the diameter of inspection
chamber and depth to permit the use of rods.
I'm keen to install the smallest I can get away with as they are not
cheap
things.
Advice please.

Umm... My sister had a house built where the existing sewer (private)
was rather deep. There does not appear to be an inspection pit at the T
junction but there is a *rodding eye* fitted. This rises at about 30deg.
and is finished with a screw down plastic cover.

Interestingly, I have a 6" private sewer running down the Bungalow's
garden,
serving about 5 houses up the road. Goes into the public sewer into the
road.

I have a pit up top and pit down bottom end, and a pit on my own bit of
4".
I spent a good half day however, digging around trying to find the pit
where they join. I uncovered a "patio" under the grass (lots of slabs),
moved all that, dug around more, but without going 4' down I'm presuming
there's just a buried junction.

Weird...


Could they be running in parallel passed your property? They would meet
again at the downstream pit, if they do.

Just a thought.