Spa Filter Baleen: AK-6082, OEM: CX500RE, Pleatco: PA50-4 , Unicel: C-7656 , Filbur: FC-1240, Diameter: 7", Length: 19-5/8"

Filter Specifications:

• Square Footage: 50 sq. ft.
• Media/Thickness: 4
• Diameter: 7"
• Length: 19-5/8"
• Top: 3" Hole
• Bottom: 3" Hole

Equivalent to:

• Pleatco: PA50-4
• Unicel: C-7656
• Filbur: FC-1240
• OEM: CX500RE

This Filter Fits The Following Brands:

Hayward StarClear C500, Hollibaugh, PDC 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

How to measure a hot tub filter references:

Spa Care Center or Pool Care Center