IPC 2013 : E03D 1/18 : Cisterns empty when not in action.

IPC2013 > E > E03 > E03D > E03D 1/00 > E03D 1/18[2] > Cisterns empty when not in action.
Notes[t] E01 - E06: BUILDING
E SECTION E — FIXED CONSTRUCTIONS.
E03 WATER SUPPLY; SEWERAGE.
E03D WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR.
E03D 1/00 Water flushing devices with cisterns.
E03D 1/18 · · Cisterns empty when not in action.