Spa Filter Darlly: 81002, Baleen: AK-7010, OEM: CX1100RE, Pleatco: PA100-4 , Unicel: C-8610 , Filbur: FC-1290, Diameter: 8-1/2", Length: 23-5/16"

Filter Specifications:

• Square Footage: 100 sq. ft.
• Media/Thickness: 4
• Diameter: 8-1/2"
• Length: 23-5/16"
• Top: 4" Hole
• Bottom: 4" Hole

Equivalent to:

• Pleatco: PA100-4
• Unicel: C-8610
• Filbur: FC-1290
• OEM: CX1100RE
• Darlly: 81002

This Filter Fits The Following Brands:

Hayward Star-Clear II C1100, Cal 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