JSY-LF-AT 2" 8070567 Fluxo: 9,2m³/hr Largura: 280mm 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