Soil pipe design/runs

[Jonny]

Hi all,

In the wait for planning and before wanting to commit to professional input for building regs drawings, I’m just starting to plan services etc around the house. 

The current thing I’m trying to work out is the runs for the soil pipes. These will eventually head out to a treatment plant (to be specced). 

Out of the two designs below, which would be preferable? 

One option minimises runs under the (insulated raft) slab and has multiple inspection chambers to pick everything up, the second utilises 45 deg branches. 

One option allows rodding access from both ends; the branch option only allows rodding from one end. This will need toilet, etc., removing to access?

Any thoughts on which is best? I can’t seem to find any guidance about minimising runs under the slab but common sense says less is more.

Let me know if there are any suggestions, and I'll resketch!

Thank you all

Thank you all

[JohnMo]

Top image will not work as you need an inspection chamber at each junction. 

 

2nd image you are going to be metres below surface by the time everything meets up with the fall requirements. Don't like the angles, would aim for 90 degs

 

Where is the treatment plant going? Start from there first. Longs runs equal very deep.

[Jonny]

Noted, I’ll redraw. The site is sloping, but not that much and the fall slipped the ‘design’

 

Treatment plant will be to the north/top of these drawings. Thank you 

[saveasteading]

1 hour ago, JohnMo said:

you need an inspection chamber at each junction. 

 

Simply by immediate appearance the top one looks preferable. I think as long as it is all roddable it is acceptable, but wold have to read the reg's with that in mind.

 

We are installing ours within the slab insulation, for pracitcal reasons, but with the added benefit of retaining height.

that can create 'cover' challenges outside, but overcome-able.

 

Apart from keeping trenches shallower as a benefit please consider where the digester will empty to.