Spa Filter Darlly: 60253, Baleen: AK-5011, OEM: N/A, Pleatco: PTL25W-P-4 , Unicel: C-6601 , Filbur: FC-3083, Diameter: 6", Length: 9-3/4"

Filter Specifications:

• Square Footage: 25 sq. ft.
• Media/Thickness: 4
• Diameter: 6"
• Length: 9-3/4"
• Top: Handle
• Bottom: 1-7/8" Hole

Equivalent to:

• Pleatco: PTL25W-P-4
• Unicel: C-6601
• Filbur: FC-3083
• Darlly: 60253

This Filter Fits The Following Brands:

Four Seasons, Aqua Spa

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