Hydro Morris valve is your problem. Kone wants $3000 for the kit to convert to Maxton. This includes a tank exstension that you glue on!!!! WTF!!!! We buy whole new pump units and replace the whole thing for less money and time than Kones 16 pages of fix!! You need prints that show hook up for Maxton as the Hydro Morris is a 3 silonid set up.