Spa Filter Darlly: 40101, Baleen: AK-3006, OEM: 817-0010,25249,378900,146949, Pleatco: PWW10 , Unicel: C-4310 , Filbur: FC-3077, Diameter: 4-1/4", Length: 4"

Filter Specifications:

• Square Footage: 10 sq. ft.
• Media/Thickness: 3
• Diameter: 4-1/4"
• Length: 4"
• Top: 2-1/16" Hole
• Bottom: 2-1/16" Hole

Equivalent to:

• Pleatco: PWW10
• Darlly: 40101
• Unicel: C-4310
• Filbur: FC-3077
• OEM: 817-0010,25249,378900,146949

This Filter Fits The Following Brands:

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