Fimco Manufacturing Standard 4-Outlet Irrigation Indexing Valve, 1.50-Inch, Black Valve is recommended for use in a pump driven irrigation system Indexing valve can run from 2 to 4 zones based on the chosen cam configuration Manual or automatic operation with 2,3, 4 zone cams and zone indicator included Requires at least 10 gpm for normal operation or contract manufacturer for a low flow assembly for 6gpm -10gpm usage 2,3, 4 zone cams and zone indicator included