... *Easy-to-use water drain plug and multi-port valve lets you select any of the valves/ filter operation ... 0.22 sq meter(filter area), 1.5’’/50mm(valve connections) 11.1 cbm/h(flow rate) 85kg(sand)Φ-650, 0 ... .32 sq meter(filter area), 1.5’’/50mm(valve connections) ... (B), 0.41 sq meter(filter area), 2’’/63mm(valve connections) 20.2cbm/h(flow rate) 215kg(sand)Φ-800, ...