Keep your pond water clear and clean with Clear Control pressure filters, whether you are running a fountain, stream or waterfall. These compact and powerful pressure filters can withstand high pressure and allow a height difference behind the filter.Functions and features of the Clear Control pressure filters: Compact and powerful up to 1.5 bar Multi-stage switch for various functions UV-C unit to combat suspended algae and pathogens Japanese mat removes coarse dirt particles Activated carbon absorbs small dirt particles Lava stone for optimum biological filtration Optional heating element in the filter Optional complete set with pond pump and hose Possible positions of the multi-position valve:Filter rinsing position: For rinsing the dirt below the grate. Empty position: For emptying the pond or rinsing the dirt in the head. Filter level: Water flows over the pre-chamber, bottom grate and filter materials to the outlet. Blocking stand: Filter does not let any water through while the pump is being cleaned. Medicine stand: Water flows directly back into the pond without being filtered. Winter stand: Pressure on the mechanics is switched off. The Clear Control pressure filters are easy to install. Connect the filter to a pond pump and place it next to the pond. Activate the UV-C lamp and the water flow. Read the instructions for use before installation.