RD25 Filter Core with 54mm hole in base- with blocker for SpaPal 2

Used with Filter Cartridge RD25S- SpaPal 2 Compatible

Regularly used with – Arctic Spas, Aegean Spas, Alps Spas, Aquavia, Artesian Spas, Baja Spas, Beachcomber Hot Tubs, Blue Whale Spas, Cal Spas, Caldera Spas, Canadian Spas, Coast Spas, Coleman Spas, Cove Spas, Coyote Hot Tubs, Desjoyaux Pools, Diamante Spas, Dynasty Spas, Emerald Spas, Freedom Spas, Hydro Spa, Hydropool, Infinity Spa, Jacuzzi, Maax Spas, Mistral Hot Tubs, Nordic Hot Tubs, Novitek, Palm Spas, Passion Spas, Pentair Pool Products, Rota Spas, Spa Crest, Sun Spas, Sunbelt Spas, Sunrise Spas, Superior Spas, Thermo Spas, Tuff Spas, US Spas, Viking Spas, Viskan, Vita Spas, Wellis Spas