Drains ~ these can be defined as a means of conveying surface
water or foul water below ground level.
Sewers ~ these have the same functions as drains but collect the
discharge from a number of drains and convey it to the final
outfall. They can be a private or public sewer depending on who is
responsible for the maintenance.
Basic Principles ~ to provide a drainage system which is simple
efficient and economic by laying the drains to a gradient which will
render them self cleansing and will convey the effluent to a sewer
without danger to health or giving nuisance. To provide a drainage
system which will comply with the minimum requirements given in
Part H of the Building Regulations.
There must be an access point at a junction unless each run can
be cleared from another access point.
Simple Domestic Drainage