JSY-LF-AT ¾" 8070571 Fluxo: 3,7m³/hr Largura: 180mm 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