Spa Filter Darlly: 40256, Baleen: AK-9010, OEM: 1561-04,74408-99, Pleatco: PDO-UF25P2 , Unicel: 4CH-950 , Filbur: FC-0173, Diameter: 4-5/8", Length: 12"

Filter Specifications:

• Square Footage: 25 sq. ft.
• Media/Thickness: 3
• Diameter: 4-5/8"
• Length: 12"
• Top: Handle
• Bottom: 1-1/4" SAE

Equivalent to:

• Pleatco: PDO-UF25P2
• Unicel: 4CH-950
• Filbur: FC-0173
• OEM: 1561-04, 74408-99
• Darlly: 40256

This Filter Fits The Following Brands:

Dimension One Spas, Saratoga

Filter Glossary

As you can see in this graphic, when looking at a filter's threads from the side the difference is very obvious. Standard, sometimes called "MPT" or "Male Pipe" threads are smaller and have a higher number of threads than the S.A.E. style. The S.A.E. threads are large and are square in nature almost resembling a child's toy.

• MPT: Male Pipe Thread
• FPT: Female Pipe Thread