You no longer have to worry about having to top off your pond - the float valve does it automatically. Simply attach a regular garden hose to the float valve and place it at the surface of the pond. Adjustable to various settings (allows the water level to be kept at the depth required). Comes complete with a multi-hose adapter 1/4 inch to 3/4 inch (5mm to 20mm). Dimensions are 2.5 X 5.25 X 10.75 UPC Code = 015561218429