The Unicel 4CH-35 Cartridge Filter is a high-capacity replacement filter designed for superior water clarity in spas and hot tubs. With 35 square feet of pleated polyester filtration media, it provides excellent dirt-holding capacity, consistent flow, and long lasting performance for Waterway and compatible spa filter systems.

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Key Features

• Genuine Unicel replacement cartridge filter (Model 4CH-35)

• 35 sq. ft. of pleated polyester media for maximum filtration efficiency

• Measures 4-5/8" diameter x 16" length

• 1-1/2" MPT (male threaded) bottom fitting for secure installation

• Premium polyester media resists chemicals, oils, and debris buildup

• Reinforced center core for superior strength and structural stability

• Compatible with Waterway and other spa filter housings of matching dimensions

• Easy to install, remove, and clean for extended service life

• Designed for optimal water flow and minimal pressure drop

• Ideal for spas, hot tubs, and small pool systems requiring high-efficiency filtration

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Product Overview
The Unicel 4CH-35 Cartridge Filter provides professional-grade filtration performance in a compact, durable design. Engineered for Waterway and similar spa systems, it captures fine debris, oils, and contaminants, ensuring crystal-clear water and balanced filtration flow.

Constructed from durable, chemical-resistant materials with a rigid internal core, the 4CH-35 withstands demanding spa environments and frequent cleanings. Its threaded 1-1/2" MPT connection ensures a secure, leak-free fit, making it a dependable, easy-to-maintain replacement choice for consistent spa and hot tub filtration performance.