Spa Filter Darlly: 90851, Baleen: AK-80112, OEM: CX850RE, Pleatco: PA85-4 , Unicel: C-9485 , Filbur: FC-1298, Diameter: 9-1/4", Length: 14-3/16"

Filter Specifications:

• Square Footage: 85 sq. ft.
• Media/Thickness: 4
• Diameter: 9-1/4"
• Length: 14-3/16"
• Top: 3" Hole
• Bottom: 3" Hole

Equivalent to:

• Pleatco: PA85-4
• Unicel: C-9485
• Filbur: FC-1298
• OEM: CX850RE
• Darlly: 90851

This Filter Fits The Following Brands:

Hayward ASL Full-Flo C850

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