Spa Filter Baleen: AK-5021, OEM: 23-2214-01, Pleatco: PJ40-4 , Unicel: C-6640 , Filbur: FC-1440, Diameter: 6-15/16", Length: 19-3/8"

Filter Specifications:

• Square Footage: 40 sq. ft.
• Media/Thickness: 4
• Diameter: 6-15/16"
• Length: 19-3/8"
• Top: 3-1/2" Hole
• Bottom: 3-1/2" Hole

Equivalent to:

• Pleatco: PJ40-4
• Unicel: C-6640
• Filbur: FC-1440
• OEM: 23-2214-01

This Filter Fits The Following Brands:

Jacuzzi® Bros. CF-40, Atlantic Pool, Cantar, Competition Pool

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