This can be achieved on the Compact Eric Filter (shown) and also on the Eric One & Eric Two models.

In this example the entire 15-gallon discharge took only 17 seconds from start to completion via a 1.5″ waste line.

The pond volume managed by the filter holds 550-gallons and this computes to a 2.7% discharge/water change, this is slowly replaced by a constant ‘drip’ of new mains water that is always added whether the filter is discharged or not..

The process can be easily and economically automated by incorporating an electrically-actuated 1.5″ ball valve and control unit.

Both mechanical and biological stages are thoroughly cleaned by using this simple method.

Waddy.