WATER RECYCLING APPARATUS

摘要

Water recycling apparatus (22) including a header tank (24) with a recycled water inlet (40) for supplying recycled water to the tank (24), a recycled water outlet (46) and tank water-level dependent control means for controlling a back-up supply of fresh water to the tank via a fresh water supply (54) which maintains the recycled water outlet (46) submerged even when recycled water is not available. An invert level (82) of an unrestricted spillway overflow (50) is situated below an outlet aperture (56) of the fresh water supply (54) to avoid the possibility of contamination of the fresh water supply. The overflow may be constituted by a slot in a side of the tank (24) or a region of tank wall which is lower than other regions.