Spa Filter Darlly: 40451, Baleen: AK-3054, Pleatco: PDS45, Unicel: C-4311, Filbur: FC-2394, Diameter: 4-15/16", Length: 12-1/4"

Filter Specifications:

• Square Footage: 45 sq. ft.
• Media/Thickness: 3
• Diameter: 4-15/16"
• Length: 12-1/4"
• Top: 2-1/8" Hole
• Bottom: 2-1/8" Hole

Equivalent to:

• Pleatco: PDS45
• Unicel: C-4311
• Filbur: FC-2394
• Darlly: 40451

This Filter Fits The Following Brands:

Dakota Spas

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