Spa Filter Darlly: 30021, Baleen: AK-2003, OEM: 58602, Pleatco: PIN3PAIR , Unicel: C-3302 , Filbur: FC-3751, Diameter: 3-1/8", Length: 3-11/16"

Filter Specifications:

• Square Footage: 2 sq. ft.
• Media/Thickness: 3
• Diameter: 3-1/8"
• Length: 3-11/16"
• Top: 1-1/8" Hole
• Bottom: 1-1/8" Hole

Equivalent to:

• Pleatco: PIN3PAIR
• Unicel: C-3302
• Filbur: FC-3751
• OEM: 58602
• Darlly: 30021

This Filter Fits The Following Brands:

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