Quote:
Originally Posted by phil24_7
Would rather it stay on the outside of the building, just in case I want to put a second storey on at some point!
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They do have them inside you know

Sometimes it's better depending on what you need to connect to them.
I smell a living room
Moving stack is not so hard. You'll need to dig up the ground over the drain.
Just connect to the drain further along bearing in mind that you will need a manhole/ inspection chamber (depends on how deep the drain is) wherever it changes direction. Surround the drain in clean chippings (the right kind; there's regulations) and back fill. You'l need to protect the drain if its under where vehicles go.
Biggest problem usually is reconnecting whatever there was originally connected to the stack where it was before.
You need to be able to rod all the straight runs through access points and each run has to 'run' so that the foul water drains away.
Theres regulations about how much 'run'.
Cant give much more advice without knowing what the exact set up is ...