We carry Fleck 1800 Brine Valve Assembly for the Fleck 3900 control valve. If you're looking for a Fleck part or product, we carry a wide variety of replacement water softener parts. If there's a specific part you're looking for, or you need help trouble-shooting, call 1-888-309-2837 and our customer service experts can help. This replacement part can be referenced as part # 60036-02.