FOR FLECK SOFTENER VALVES. Piston, seal and spacer kit, brine piston, stuffer tool, PLUS silicone lubricant for the Fleck 2510 and 2510SXT. These wear out over time and can cause your control head to work inefficiently, including constant water down the drain line, poor backwash, incomplete contaminant removal, worn motors, and more. Kit includes complete seal & spacer kit (60121), piston (60090), brine valve (60011), and stuffer tool (11098) which greatly reduces the time and stress of replacing the seals and spacers without it. Kit also comes with a bonus package of silicone lubricant. This makes DIY very easy and stress free for the homeowner. *****Rebuild kit for the Fleck 2510 softener valve NOT for filter/air injection valves. See ASIN B07FW394F5 for Filter Valve Repair Kit.*****