This Unicel hot tub filter replaces the Pleatco PRB50-IN, Master Deluxe 40506 and Filbur FC-2390. 

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-4950:

Aber Hot Tubs, Accent Spas, Acryx-Maax Spas, Alps Spas, American Spas, Apollo Spas, Aqua Mystic Spas, Aqua Tech Spas, Aquiform-Infinity Spas, Arcadia Spas, Arctic Spas, Artesian Spas, Atera Spas, Baja Spas, Beachcomber, Belize Spas, Blue Falls Manufacturing Ltd., Blue Pacific Spas, Bullfrog Spas, Cal Spas, Caldera Spas, Canadian Spa Co., Charisma Spas, Clipper Spas, Coast Mountain Spas, Coast Spas, Coleman Spas, Columbia Spas, Crystal Waters Spas, Custom Molded Products, Diamond Back Spas, Discovery Spas, Dynasty Spas, Emerald Spas, Four Winds / Streamline Spas, Freedom Spas, Gatsby Spas, Great Lakes Home & Resort, H2O Spas, Haughs, Haven Spas, Hawkeye Spas, Heldor Spas, Honey Tubs, Hot Spring Spas, Hydropool Industries, Hydro Spa, Icon / Keyes Spas, Infinity Spas-TN, Islander Spas, J.E.M. Spas, Jacuzzi Premium, Leisure Bay Manufacturing, Maax Spas, Marathon Spas, Midwest Spas, Millennium Spas, Moonwater Spas, Morgan Spas, Northwest Spas, Orca Bay Spas, Pacific Spas by Aber, Pageant Spas, Pentair Pool Products -Rainbow Plastics, Phoenix Spas, QCA, Rising Dragon, River Valley Spas, Rubadub Tub, Safari Spas, Seahorse Spas, Sequoia Design, Sierra Spas, Signature Spas, Sonoma Spas, Southwest Spas, Spa Crest, Spas Direct, Streamline Spas, Strong Industries, Sun Coast Spas, Sun Ray Spas, Sun West Spas, Sunbelt Spas, Suncountry Spas, Sundance Spas, Sunrise Spas, Sunset Spas, Superior Spas, Tiara Spas, Tuff Spa, US Spas, US Tooling & Spas, Viking Spas, Vita Spas, Warm Springs Spa, Waterway Plastics, Wind River Spas, Zone Spas and more.

Also known by these other OEM part numbers:

• 03FIL1600

• 17-2380

• RTL-50

• 100533

• 6540-471

• 25391

• 25393

• 817-5000

• R173434

• 5001

• 373045

• 3301-2145

• 76076

• 73533

• 302005

• 3005815