The inlet filter, (strainer) uses a proportion of the pump’s output to supply a feed to the internal backwashing rotor. The twin jets of the cleaning rotor rotate at about 60 rpm, cleaning the whole screen every ½ second. Approximately 20 – 25% of the pump output is required to supply the cleaning rotor.
For a larger capacity (up to 60 litres per minute) these filters can be combined to form a double headed duplex version that uses the same technology and filter cages, giving twice the flow rate.
As the cleaning mechanism is on the filtered side of the screen debris in the water will not obstruct the mechanism