The Unicel 4CH-22 Cartridge Filter is a high-performance, 25-square-foot replacement cartridge designed for spas and hot tubs. Built for superior water clarity and durability, it efficiently removes fine debris and contaminants while maintaining consistent flow, making it ideal for Waterway and compatible filtration systems.

Key Features

Genuine Unicel replacement cartridge filter (Model 4CH-22)
25 sq. ft. of pleated polyester media for enhanced filtration capacity
Measures 6-5/8" in diameter x 8" in length
Features 1-1/2" MPT (male threaded) bottom fitting for secure connection
Durable polyester media resists chemical degradation and pressure fatigue
Reinforced core design ensures rigidity and high flow performance
Compatible with Waterway and other spa filtration housings using matching dimensions
Easy to install, remove, and clean for long service life
Provides consistent filtration with reduced maintenance intervals
Ideal for residential spas, hot tubs, and small pool systems

Product Overview
The Unicel 4CH-22 Cartridge Filter delivers dependable, high-capacity filtration for spa and hot tub systems requiring a compact yet efficient design. Its precision-engineered pleated polyester media captures dirt, oils, and fine particles to maintain clean, sparkling water.

Constructed with durable end caps, a rigid inner core, and a 1-1/2" MPT threaded connection, this filter offers secure installation and reliable performance under pressure. Easy to maintain and built to last, the Unicel 4CH-22 is an excellent choice for maintaining consistent water quality and ensuring the longevity of your spa or hot tub filtration system.

Unicel | 4CH-22 | Cartridge Filter – 25 Sq. Ft., 6-5/8" Diameter, 1-1/2" MPT Threaded Fitting