This Unicel hot tub filter replaces the Pleatco PRB25-IN, Master Deluxe M42513 and Filbur FC-2375. 

Use a genuine Unicel brand hot tub filter to keep your hot tub water sparkling clean and beautiful. Made with Reemay filter media, the genuine Unicel brand hot tub filters are durable and effective at capturing the smallest of debris making it easier to take care of your hot tub water. Genuine Unicel hot tub replacement filters are available in a variety of sizes and built to OEM specifications, you’re sure to get a reliable hot tub filter that fits your hot tub perfectly. Use this replacement filter to replace your worn or damaged hot tub filter or as a back up to maximize the time between filter changes. Easy to install, the genuine Unicel replacement filter delivers OEM quality performance at a great price.

Manufacturers who use the C-4326:

Accent Spas, Acryx-Maax Spas, Apollo Spas, Aqua Mystic Spas, Beachcomber, Blue Falls Manufacturing Ltd., Coast Mountain Spas, Coleman Spas, Custom Molded Products, Dakota Spas, Emerald Spas, Endless Pools, Four Winds Spas, Great Lakes Home & Resort, Honey Tubs, Hot Spot, Hot Spring Spas, Hydropool Industries, Islander Spas, Jacuzzi Premium, Leisure Bay Manufacturing, Maax Spas, Moonwater Spas, Nordic Hot Tubs, Orca Bay Spas, PDC Spas, Pentair Pool Products -Rainbow Plastics, QCA, Rec Warehouse, River Valley Spas, Royal Spas, Rubadub Tub, Safari Spas, Signature Spas, Spa Manufacturers Inc., Streamline Spas, Sun Ray Spas, Thermo Spas of Connecticut, US Spas, Viking Spas, Water's Edge Spas, Waterway Plastics, Zone Spas and more.

Also known by these other OEM part numbers:

• 17-2327

• 100586

• 22521

• 25392

• 303909

• M-4326

• 817-2500

• R173429

• 2501

• 373045

• 33521

• 3301-2242