FlowVis Flow Meters from H2O Flow
H2O Flow (Sylvania, OH) has introduced the FlowVis Flow Meter, an affordable, reliable control device designed specifically for pools, spas, fountains and waterfeatures. Available in five sizes from 1.5 to 4 inches, the easy-to-install units function as both flow-measuring units (crucial to efficient use of variable-speed pumps) and as fully functional check valves. For details, click here.