Velda Silenta Pro Air Pump 4800

Thanks to the high quality of the materials used and the extra strong lid clamps, this filter can provide higher water pressure. The pressure filter has a 7-position handle switch that controls the various functions.The options are: 1- flush position (this position is used to rinse off any dirt under the grid), 2- do not use for ponds, 3- pond drain (this position is used to empty the pond and rinse away any dirt in the valve), 4- filtering (standard running position), 5- stop (the pump can be cleaned while the water remains in the filter), 6- bypass (this is the position for adding medication or supplements; the filter is bypassed so the medication remains in the water), 7- winter (in this position there is no pressure on the valve when the filter is not in use).In addition, the pressure filter is equipped with a dirt indicator on the top of the lid that shows the degree of contamination in the filter material and thus also the