The Unicel 4CH-25 Cartridge Filter is a 23-square-foot replacement spa and hot tub filter engineered for high-performance water clarity and durability. Built with premium pleated polyester media and a 1-1/2" MPT threaded fitting, this filter delivers reliable debris capture and smooth water flow for consistent, long-lasting filtration.
Key Features
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Genuine Unicel replacement cartridge filter (Model 4CH-25)
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23 sq. ft. of pleated polyester media for efficient dirt and debris removal
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Measures 4-5/8" diameter x 8" length
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1-1/2" MPT (male threaded) bottom fitting for secure installation
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Durable polyester media resists chemicals and pressure fatigue
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Reinforced core provides structural stability under high flow conditions
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Compatible with Waterway and other spa and hot tub filtration systems
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Easy to install, clean, and maintain for extended service life
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Promotes superior water clarity and balanced circulation
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Ideal for spa owners seeking dependable, high-efficiency filtration
Product Overview
The Unicel 4CH-25 Cartridge Filter provides excellent water filtration for spas and hot tubs, capturing fine debris and contaminants to maintain crystal-clear water. Its precision-engineered design ensures optimal flow and minimal maintenance, helping extend the life of your spa’s circulation system.
Constructed with high-quality polyester media, a reinforced internal core, and a 1-1/2" MPT threaded connection, the 4CH-25 offers a secure fit and reliable operation. Designed for long-term use in chemically treated spa environments, this Unicel filter combines performance, durability, and ease of maintenance—making it a trusted choice for efficient and consistent spa water filtration.
