Unicel 4CH-21 Filter Cartridge Brand_GLB The filter media has to

The filter media has to stay moist to keep working

and the days you simply forget to test

comfortable pH in your spa or hot tub — and softens the water at the same time

The switch automatically resets to OFF

Designed to fit all LEDGE/DB grill models with built-in flaps to cover front and side shelves

Unicel 4CH-21 Filter Cartridge Brand_GLB The filter media has toUnicel 4CH 21 Filter Cartridge Overview Experience superior filtration with Unicels top tier cartridges, crafted with over 45 years of expertise. Key features include: Durable End Caps: Exact OEM fit and chemical resistant. Advanced Filter Media: Maximum dirt holding capacity and chemical resistance. Optimized Pleats: Uniform folds for enhanced flow and efficiency. Solid Core: Ensures structural integrity and optimized flow. Built to exceed OEM