Spa Filter Darlly: 60453, Baleen: AK-5010, OEM: 31115, Pleatco: PWK40 , Unicel: C-6600 , Filbur: FC-3930, Diameter: 6-3/8", Length: 11-7/8"

Filter Specifications:

• Square Footage: 45 sq. ft.
• Media/Thickness: 3
• Diameter: 6-3/8"
• Length: 11-7/8"
• Top: 3" Hole
• Bottom: 3" Hole

Equivalent to:

• Pleatco: PWK40
• Unicel: C-6600
• Filbur: FC-3930
• OEM: 31115
• Darlly: 60453

This Filter Fits The Following Brands:

Hot Springs Spas, Hot Spot, Tiger River, Watkins

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