4CH-50 replaces: Filbur FC-0151 UPC 645544001511, Pleatco PTL50P4-4 UPC 090164999432. OEM 1561-05. Unicel UPC 678285240079.

• Diameter: 4 5/8-inch
• Length: 14 3/4-inch

Commonly used in: Addison Spas, Advanced Spa Design, American Classic Spas, Aqua Tech Spas, Dimension One Spas, Dynasty Spas, Florida Whirlpool, Great Northern Engineering, Nemco Spas, OpuSpas and others.