The Unicel C-7335 delivers 35 square feet of filtration built on Reemay® polyester media. Built to meet or exceed OEM specifications, it’s the replacement cartridge for the Dimension One Spas SpaBerry®, taking the place of OEM part 1561-01.
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.
This is a distinctive cartridge, and its shape is the giveaway: at 7-1/8 inches across but only 5-7/8 inches tall, it’s wider than it is tall — a squat, compact design built for the SpaBerry’s filter housing. Its closed top and 2-inch twist-lock bottom secure it with a quarter-turn rather than a thread or a friction fit. The media is Reemay, whose trilobal fibers deliver roughly 45% more surface area than standard rounded filter fibers, so it captures more and releases dirt readily when rinsed. Made in the USA.
Pro Tip: The twist-lock bottom is what identifies this cartridge — look for it before ordering. Most spa filters seat with a threaded fitting or simply drop into a well, but the C-7335 uses a 2-inch twist-lock connection that engages with a turn and clicks into place. If your current filter threads in or lifts straight out, it’s a different part. Combined with the unmistakable squat shape — wider than it is tall — those two details confirm the fit in seconds.
Brand
UNICEL®
