This bottom or side entry compact fill valve has a piston closure. Its design allows a quick installation and assembly. It has a 3/8" brass connector and a height adjustable float. This fill valve is compatible with all ceramic cisterns. It is made from high quality plastics and anti-scale materials for a long service life and less maintenance frequency. Its backflow preventer will prevent returns or backflows of water due to a loss of pressure or a reduction of water flow.