To exempt certain fixture drains from the requirement for an indirect connection in Subclauses 2.4.2.1.(1)(e)(i) and 2.4.2.1.(1)(e)(ii), and to permit direct connection to pipes that:
This is to limit the probability of backflow protection, which could lead to sewage contamination of food preparation fixtures or sterilization devices, which could lead to unsanitary conditions, which could lead to harm to persons.