Unicel | 4CH-65 | Cartridge Filter – 65 Sq. Ft., 19-5/8" Length, 1-1/2" MPT (V) Threaded Fitting

The Unicel 4CH-65 Cartridge Filter is a premium 65-square-foot replacement filter engineered for maximum dirt-holding capacity and water clarity. Designed for Waterway and compatible spa and hot tub filtration systems, this high efficiency cartridge provides reliable performance, durability, and easy maintenance in demanding spa environments.

---

Key Features

• Genuine Unicel replacement cartridge filter (Model 4CH-65)

• 65 sq. ft. of pleated polyester filtration media for superior debris removal

• Measures 4-5/8" diameter x 19-5/8" length

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

• Constructed from premium polyester media resistant to chemicals and heat

• Reinforced center core ensures rigidity under high flow and pressure

• Compatible with Waterway and other spa filter housings with matching specifications

• Easy to install, remove, and clean for long-lasting use

• Provides balanced water flow and extended cleaning cycles

• Ideal for large spas, hot tubs, and compact pool systems

---

Product Overview
The Unicel 4CH-65 Cartridge Filter delivers exceptional filtration performance for spas and hot tubs requiring a high-capacity, durable replacement cartridge. Its 65-square-foot pleated polyester media captures fine particles and contaminants efficiently, promoting consistently clear and clean water.

Built for strength and reliability, the filter features a threaded 1-1/2" MPT (V) connection for a tight, leak-free fit and a reinforced internal core for stability under operating pressure. The Unicel 4CH-65 offers a perfect combination of filtration power, ease of maintenance, and long service life—making it an ideal choice for maintaining peak performance in residential and commercial spa systems.