The Brine Line Flow Control BLFC Button Retainer #13245 by Pentair is a genuine OEM replacement part specifically designed for Fleck water softener systems. Made of white plastic, this retainer ensures proper functionality of the water filtration system by maintaining the correct flow control for sediment removal through carbon/charcoal filtration. With one retainer included in the pack, this genuine Pentair product is essential for maintaining the efficiency and effectiveness of your water softener system.