Darlly DGS 1112 FC 9520 PFS 1224 24 SqFt Pool DE Grid Set onoffvalves This product has practical value This product has practical value because the three pack format helps reduce reorder frequency and supports owners who prefer to keep replacement treatment media on hand The Hydro Quip Aquatherm HQ300 current collector is designed for compatible HQ300 heater related applications where the supported electrical current transfer component needs replacement Grid sets are especially practical during more complete filter rebuilds where the entire internal assembly has aged together and a single panel replacement is no longer the most efficient option 24 square foot configuration