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The Waterway 817-3510 R is a compatible replacement for the following pool filters:
The Waterway 817-3510 Comp Pool & Spa Filter Cartridge is a pool water filter replacement that improves the quality of swimming pool and spa water through the combination of premium media and 35 square feet of area. This compatible Waterway filter measures 4 15/16" in diameter x 4 5/8" in length, and has 2 1/8" Open top/bottom styles.