Waste water plumbing has traditionally been a fairly simple process using solvent-weld or push-fit PVC pipes and fittings. Due to the problems of PVC as a material it is worth considering using polypropylene (PP) as an alternative. It is now becoming more readily available. It is more easily recycled and can also be easily reused. Most of the systems on the market are interconnectable.
There are a few products on the market for reclaiming heat from waste warm water – especially shower waste, by running the waste water through a heat exchanger and directly heating the incoming water.
The Building RegulationsThese are the legal regulations which govern how a house is constructed. (not to be confused with Planning Permission which is about whether you are allowed to build the house at all or what it might look like) see Building Regulations) have quite a lot to say about pipe sizes, lengths of pipe runs, traps, vents and overflows. Most of this information should show up on your drawings.