JSY-LF-AT 1" 8070572 Fluxo: 4.4m³/hr Largura: 195mm Time-controlled automatic backwash: Filter screen surface is cleaned three times during each backwasH Pre-selectable interval: 1 day, 1 week, 1 month, 2 months Buffer battery ensures the backwash is completed even in case of power failure Test unit for the buffer battery Plug-in power supply