These Pumps with UV Clarifier come with a built-in ultra violet clarifier and has an optimum pumping height of up to 7 ft. and can be adjusted with the easy to use, built-in variable flow control valve. These newly designed pumps have several safety features including the easy to use, pull-off kick back panel, making it easy to replace the 6-watt UV bulb. UV pumps sterilize water, reducing harmful bacteria and algae to ensure a beautiful, clean, clear pond. They will dramatically minimize the need for maintenance and water treatments, which will save you time and money in the long run. These pumps are designed for fresh water use only. The best part is, all of our pond pumps come with a 3 year warranty! 90 day warranty on bulb. UL listed.