Technical Booklet N Drainage·Page 9·0.1
Performance Standards for Foul Water Drainage Systems
Foul water drainage systems must convey flow to an appropriate outfall, minimize blockage and leakage risks, prevent foul air from entering the building, be properly ventilated, and remain accessible for maintenance.
It is the view of the Department that the requirements of regulations 80 and 81 will be met if a foul water drainage system –
(a) conveys the flow of foul water to a foul water outfall connected to a foul or combined sewer, a cesspool, septic tank or similar structure;
(b) minimises the risk of blockage or leakage;
(c) prevents foul air from the system from entering the building under working conditions;
(d) is ventilated; and
(e) is accessible for clearing blockages.
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