Flow-Clik Flow Range Pipe Diameter Operating range (l/min) Minimum Suggested maximum* 25 mm 23 64 40 mm 50 132 50 mm 76 208 80 mm 150 450 100 mm 225 750 * Good design practice dictates the maximum flow not to exceed 1.5 m/sec. Suggested maximum flow is based upon Class 200 IPS plastic pipe.