two-pipe system definition
two-pipe system means a drainage installation in which the discharges from soil-water fittings and waste-water fittings are conveyed to a drain by separate pipes and in which the waste-water pipes are separately ventilated and are separated by traps from the drain;
two-pipe system means a system of piping between sanitary fixtures and a drain in which waste water and soil water discharge through separate discharge pipes and in which any trap venting or other venting that is required is via separate event stacks for the waste and soil water systems;
two-pipe system means a system of piping between sanitary fixtures and a drain, in which separate stacks are used for waste water and soil water and each stack is vented and all traps are vented.