Spa Filter Baleen: AK-60452, OEM: CX1380RE, Pleatco: PA137-4 , Unicel: C-7490 , Filbur: FC-1297, Diameter: 7", Length: 32-13/16"

Filter Specifications:

• Square Footage: 137 sq. ft.
• Media/Thickness: 4
• Diameter: 7"
• Length: 32- 13/16"
• Top: 3" Hole
• Bottom: 3" Hole

Equivalent to:

• Pleatco: PA137-4
• Unicel: C-7490
• Filbur: FC-1297
• OEM: CX1380RE

This Filter Fits The Following Brands:

Hayward Super-Star-Clear C5500 - SwimClear C5520, CX1380XRE

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