Piston and Seals KIT FLECK 5810 ; Filter Part # 61956-03 Note this Piston has a Yellow Dot on it. Do not confuse with the 61956-01 version ( water softener - Downflow ), which has White Dot. Or the 61956-02 version ( water softener - Upflow ), which has a Blue Dot. Additional Details ------------------------------ Product description: Piston and Seals KIT FLECK 5810 ; Filter Part # 61956-03 Note this Piston has a Yellow Dot on it. Do not confuse with the 61956-01 version ( water softener - Downflow ), which has White Dot. Or the 61956-02 version ( water softener - Upflow ), which has a Blue Dot.