An integral
water saving device is composed of multiple sets of single-layer
water saving devices, a pipeline
system and a water feeding
system. The water feeding
system comprises a water pump, a water feeding
pipe and a big
water storage tank, the pipeline system comprises a blow-off
pipe and a
water supply pipe, each single-layer
water saving device comprises a
sewage treatment system, a pedestal pan, a coarse filtering net, a defection cloth water discharging pipe, a mop
pool, a washbasin, a washing
pool and a ground water
clock, and each
sewage treatment system comprises a
water storage tank, a
sewage treatment device, a kitchen water discharging pipe, a water outgoing pipe, a regulating device and a
water supply pipe; the single-layer water saving devices are connected sequentially through the pipeline system, domestic sewage generated by the washbasin, the washing
pool and the ground water
clock on a storey is subjected to treatment through the coarse filtering net and the
sewage treatment device to form secondary
usable water to be stored in the
water storage tank of the next layer, each
water storage tank is mounted at a higher position of the corresponding storey and used for providing water for the pedestal pan and the mop pool on a same storey, and each layer is the same; after each
water storage tank is filled with water, surplus water enters the next layer through a pipeline and sequentially enters from a higher layer into a lower layer, and each layer is the same; the big
water storage tank is mounted on the layer N, water of the big water
storage tank enters the
water supply pipe and the water
storage tank of the layer A through the corresponding water pump and the corresponding water feeding pipe, and integral water saving of a building is realized. The integral water saving device is simple in structure, easy to assemble and material saving.