Spa Filter Baleen: AK-5019, OEM: N/A, Pleatco: N/A , Unicel: C-6622 , Filbur: FC-3746, Diameter: 6-1/2", Length: 22"

Filter Specifications:

• Square Footage: 30 sq. ft.
• Media/Thickness: 4
• Diameter: 6-1/2"
• Length: 22"
• Top: 3" Hole
• Bottom: 3" Hole

Equivalent to:

• Pleatco: N/A
• Unicel: C-6622
• Filbur: FC-3746
• OEM:

This Filter Fits The Following Brands:

Coleco DR-22, F-475, F-480, F-375, F-

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

How to measure a hot tub filter references:

Spa Care Center or Pool Care Center