Paragraph 3.7 Wastewater drainageF1
Every wastewater drainage system serving a building must be designed and constructed in such a way as to ensure the removal of wastewater from the building without threatening the health and safety of the people in and around the building, and–
(a)
that facilities for the separation and removal of oil, fat, grease and volatile substances from the system are provided;
(b)
that discharge is to a public sewer or public wastewater treatment plant, where it is reasonably practicable to do so; and
(c)
where discharge to a public sewer or public wastewater treatment plant is not reasonably practicable that discharge is to a private wastewater treatment plant or septic tank.
Limitation
Standard 3.7(a) does not apply to a dwelling.