Setup of a rainwater harvesting system
WISY's principle of 4-stage purification makes rainwater storable. This increases independence from the water supplier and clear water is also available in dry periods:
Level 1
All particles larger than 0.28 mm are separated in the pre-filter, such as the vortex fine filter. The filtered rainwater is enriched with oxygen so that unwanted anaerobic bacteria have no chance. 90% of the water is stored cleanly in the cistern, while the vertical stainless steel mesh constantly cleans itself with the residual water.
Level 2
The smoothing inlet carefully distributes the fresh water in the cistern without stirring up sediment. Stored water remains clear.
Level 3
The clear rainwater is extracted in the cleanest area of the cistern, around 20 cm below the water surface. It is drawn in via the floating suction filter. A pump transports it directly or via an intermediate tank to the consumers where it is used.
Level 4
The top layer of water is regularly flushed into the overflow of the multi-siphon. This prevents a barrier layer from forming on the water surface and the oxygen exchange between air and water remains optimal. The backflow protection, small animal protection and odour trap provide additional protection for the cistern overflow.
