CPC E03B 1/042 (2013.01) [B01D 29/668 (2013.01); B01D 35/143 (2013.01); B01D 35/147 (2013.01); C02F 1/001 (2013.01); C02F 1/008 (2013.01); C02F 1/283 (2013.01); C02F 1/44 (2013.01); C02F 1/686 (2013.01); C02F 1/76 (2013.01); E03B 1/041 (2013.01); E03D 5/003 (2013.01); C02F 2103/002 (2013.01); C02F 2209/03 (2013.01); C02F 2209/40 (2013.01); C02F 2209/42 (2013.01); C02F 2303/16 (2013.01); E03B 2001/045 (2013.01); E03C 1/26 (2013.01); Y02A 20/148 (2018.01); Y02A 20/30 (2018.01)] | 7 Claims |
1. A method of filtering grey water comprising steps of,
filtering influent water from a shower or bath through a filter element;
monitoring one or more sensors located upstream of the filter element or in a by-pass around the filter element to detect a) the presence of a hold-up volume of influent water upstream of the filter element selected to indicate a decline in filter element permeability or free surface elevation of influent water upstream of the filter element selected to indicate a decline in filter element permeability or b) water by-passing the filter element;
cleaning the filter after the selected hold-up volume or selected free surface elevation is sensed, or after water by-passes the filter element, wherein cleaning the filter comprises flowing water through the filter in a reverse direction and contacting a flapper valve with the flowing water.
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