Hunter HC-50F-50F-1/2 in FPT X 1/2 in FPT Check Valve An economical water-saver that eliminates low head drainage for sprinklers located on slopes Low head drainage is a fact of life when dealing with variable elevation landscapes. Water will naturally settle to those low points of the system, resulting in unwanted puddles of wasted water. With Hunter? s new, easy to use HCV you won? t have to deal with this problem ever again.,Hunter HC-50F-50F-1/2 in FPT X 1/2 in FPT Check Valve An economical water-saver that eliminates lo