Unicel 6CH-47 | 47 sq ft Top Load Spa Filter

The Unicel 6CH-47 is a top-load spa filter cartridge delivering 47 square feet of filtration across 225 pleats of Reemay® 2033 polyester media. Built to meet or exceed OEM specifications, it's one of the most broadly used top-load cartridges in the industry — fitting Marquis, Sundance, Jacuzzi Premium, LA Spas, Gatsby, Hydro Spa, and many more. Filtration is the quiet backbone of clean spa water. 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 spread everywhere: dull water, higher chemical use, softer jets, and a pump and heater straining against restricted flow. What separates a Unicel from a bargain cartridge is the media itself. Reemay uses a trilobal fiber — three-lobed in cross-section rather than round — which delivers roughly 45% more surface area than standard rounded filter fibers. More surface means more places to capture dirt and oils, higher dirt-holding capacity, and more time between cleanings. Add sharp pleat folds that maximize spacing for full use of the media, tough urethane end caps built to last the life of the cartridge, and a semi-circular handle that makes removal effortless. Made in the USA. Pro Tip: The 6CH-47 and 6CH-940 are the easiest two cartridges to mix up — check the thread standard. Both are 6 inches in diameter, both have 225 pleats, both have a semi-circular handle, and both have a 1-1/2 inch threaded bottom. But this 6CH-47 uses an MPT (male pipe thread) and measures 9-1/8 inches, while the 6CH-940 uses an SAE thread and measures 8-1/4 inches. MPT and SAE are different thread forms and won't interchange — read the number off your old cartridge before ordering. Brand UNICEL®