Skimmer weir door replacement designed for inground pool and spa automatic skimmers. This 8 in x 5.1 in x 0.74 in weir flap restores proper skimmer function by controlling water level and debris flow. Key benefits Maintains water level by preventing water from escaping the skimmer compartment, supporting efficient circulation. Reduces debris entry into the skimmer, lowering cleaning frequency and helping keep pool water cleaner. Simple snapin replacement that restores original skimmer performance without complex tools. Features and attributes Function: Acts as the skimmer weir flap to regulate water flow and block excess debris. Compatibility: Compatible with model S15 and S20 skimmers. Replacement for part numbers 85001500 and 25251000500. Before , compare this part with your original to ensure fit. Size: 8 in width x 5.1 in height x 0.74 in thickness. No tools required for installation; designed to match original dimensions for a secure fit. Easy installation 1. Remove the skimmer cover and take out the old weir. 2. Position the flat side of the replacement flap facing the skimmer. 3. Ensure the curved side faces the pool. 4. Slide one side notch into the groove on the skimmer wall that sticks out. 5. Press the flap down fully and snap the other side notch into the opposite groove. 6. the skimmer cover. Typical applications Residential inground swimming pools to maintain skimmer efficiency. Pool spas where consistent water level and debris control are needed. Routine maintenance or when the original skimmer weir is warped, cracked, or no longer sealing properly. Replacement note This product replaces part numbers 85001500 and 25251000500. Compare with your existing weir before to confirm compatibility with your skimmer model.