Top Load Filter Cartridge

The Unicel 4CH-21 hot tub filter cartridge is know to fit select spa model's by Atera Spas, Dream Maker Spas Cottage Collection pre-2014, Hydro Spas, Maax Spas, Saratoga & Vita Spas and others. Due to the range of models and filter sizes used by these spa manufacturers it's good practice to confirm this filter size is the same as the filter in your actual hot tub model. Filter details: Unicel P/N: 4CH-21 Diameter: 4-5/8" Length: 8" Top: Closed Molded Cone Handle Bottom: 1-1/2" MPT Thread 19 sq.ft. Filter Media: 3oz Pleat count: 158 Also compatible replacement for: 20245-238 Pleatco PVT 25N Pleatco PDM25P4 Master Deluxe M40191 FC-0126 Why Unicel Filters?Unicel has been the nations leading swimming pool and hot tub filter manufacturer for over 45 years. Discerning pool and spa owners always insist on using Unicel brand filters to protect the equipment and for cleaner, clearer water with less work.