The Unicel 4CH-19 Cartridge Filter is a premium-quality replacement spa and hot tub filter designed for reliable, efficient water filtration. With 13 square feet of filtration media and a compact 4-5/8-inch diameter, this cartridge provides excellent dirt-holding capacity and long-lasting water clarity for compatible Waterway and similar filter housings.

Key Features

• Genuine Unicel replacement cartridge filter (Model 4CH-19)

• 13 sq. ft. of pleated polyester filtration media for efficient debris removal

• Measures 4-5/8" in diameter x 6-3/4" in length

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

• High-strength polyester media resists chemicals and maintains flow performance

• Reinforced core and durable end caps ensure structural integrity

• Compatible with Waterway and select other spa filter systems

• Easy to clean and reinstall, reducing maintenance frequency

• Designed for optimal flow and pressure balance in compact systems

• Ideal for hot tubs, spas, and small above-ground pool filters

Product Overview
The Unicel 4CH-19 Cartridge Filter offers dependable performance in compact spa and hot tub filtration systems. Engineered with precision pleated polyester media, it captures fine debris, oils, and contaminants to maintain clear, balanced water.

This filter’s rugged internal core and threaded 1-1/2" MPT fitting ensure a secure, leak-free fit in compatible housings. Built to withstand repeated cleaning and long-term exposure to chemicals, the Unicel 4CH-19 provides consistent water quality and durability—making it an excellent replacement for maintaining optimal spa and hot tub performance.