: Isometric of a wet vent, circuit vent, and individual vent. Key rule: Vent must rise vertically before offsetting (minimum 150mm above fixture flood level).
: Cross-section of a grease interceptor (kitchen floor) and oil interceptor (garage/repair shop). national plumbing code of the philippines illustrated pdf
: Every building intended for human habitation must have a supply of pure, wholesome water protected from backflow or back-siphonage. : Isometric of a wet vent, circuit vent, and individual vent
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