The Unicel 4CH-252 Cartridge Filter is a durable, high-performance replacement filter designed for spas and hot tubs requiring compact yet efficient filtration. With 25 square feet of pleated polyester media and a 2-inch MPT threaded fitting, this cartridge provides superior debris capture, easy maintenance, and long-lasting water clarity.
Key Features
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Genuine Unicel replacement cartridge filter (Model 4CH-252)
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25 sq. ft. of pleated polyester media for excellent filtration efficiency
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Measures 4-5/8" diameter x 8" length
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Features 2" MPT (male threaded) bottom fitting for secure installation
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High-quality polyester media resists chemicals, heat, and pressure
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Reinforced core ensures structural integrity under demanding conditions
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Compatible with Waterway and other spa systems with matching specifications
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Easy to clean and reinstall for extended service life
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Provides balanced flow and reduced maintenance frequency
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Ideal for spas, hot tubs, and small aquatic filtration systems
Product Overview
The Unicel 4CH-252 Cartridge Filter offers dependable performance for spa and hot tub systems requiring compact, high-capacity filtration. Its precision-pleated polyester media efficiently captures dirt, oils, and fine particles, maintaining clean and balanced water conditions.
Engineered for strength and long-term use, the 4CH-252 features a 2-inch MPT threaded connection for a secure, leak-free fit and a rigid internal core for optimal flow stability. Built to OEM standards, this Unicel filter provides an excellent combination of durability, efficiency, and ease of maintenance—ensuring superior water quality and reliable operation in any spa environment.