1. Compatible with Filter Pump: The pool valves are specially designed for use with filter pump models 28635EG, 28633EG, and 28671EG. The 25010 valve assembly creates a secure connection between your pool and filter pump system, allowing proper circulation and filtration. The precise engineering ensures fit and functionality for your specific pump models. 2. EASY REPLACEMENT INSTALLATION: The pool piston valve assembly features a straightforward design that makes replacement quick and easy. NO SPECIAL TOOLS REQUIRED—simply remove the old valve and install the one to restore proper water flow. The intuitive design helps maintain the efficiency of your filter pump system without complicated setup procedures or professional help. 3. CONSTRUCTION: Made of durable plastic materials, these pool piston valves can withstand the challenges of outdoor pool environments. The sturdy construction resists wear and tear from regular use and contact with pool chemicals, providing reliable performance throughout the swimming season. The grey color matches your existing gear for a cohesive look. 4. OPTIMIZE WATER FLOW: These filter pump valves effectively regulate the flow between your pool and the filtration system. By controlling the direction and volume of the water movement, they help your filter pump operate at peak performance. Proper flow regulation contributes to a cleaner, clearer pool and more efficient filtration for your aboveground swimming pool.