WATER PIPE DIAMETER: for the sake of convenience, the values in the table are calculated on external pipe diameters as there are many thickness specifications (the exact flow rate and speed calculation is made on internal diameters).
FLOW RATE: the flow rate values in the table are the minimum flow rate*.
SPEED: the speed in the table is to be observed for the device to operate best. Increasing it does not lead to losses in performance, but reducing it makes the effect be gradually lost (e.g. 1.50 m/s with about 30% loss).