Autotrol1242677 255/740 8 12V NO Cover Water Softener 5 Cycle Logix Control - 255 Valve"

Great price for a new valve.I remove the bottom collar layer from head and replaced only the valve body and head, leaving the lower collar in place on tank.Never try to unscrew the valve collar from the tank as it will dislodge the dip tube from the gravel on the bottom and you cannot just put it back in without repacking the entire tank. No reason to ever replace that part anyway.