Caldera 73722 | 100 sq ft Utopia Spa Filter

The Caldera 73722 filter cartridge is a factory-original replacement built for Caldera Utopia® Series spas. With 100 square feet of filtration across 260 pleats of heavy-duty polyester, it delivers more efficient filtration and better water clarity — so you spend less time cleaning and more time enjoying your hot tub.

Your filter handles the work you never think about. Every soak leaves behind body oils, lotions, hair, and fine debris, and the cartridge is what removes all of it before it clouds the water, feeds bacteria, or coats your plumbing. When a filter is worn or clogged, the effects show up everywhere else: dull water, higher chemical use, softer jets, and a pump and heater straining against restricted flow.

This is a large-capacity cartridge — a full 100 square feet, matched to the demands of Utopia Series spas, which are built as genuine hydrotherapy powerhouses with high jet counts and generous water volumes. Caldera specifies a heavy-duty polyester media designed to outlast cheaper alternatives, and a practical semi-circular handle on top makes lifting the cartridge out for cleaning simple. Like all Caldera filters, it's made in the USA.