Spa Filter Baleen: AK-4025, OEM: 27-077, Pleatco: N/A , Unicel: C-5622 , Filbur: FC-2015, Diameter: 5-3/16", Length: 11-7/8"

Filter Specifications:

• Square Footage: 22 sq. ft.
• Media/Thickness: 4
• Diameter: 5-3/16"
• Length: 11-7/8"
• Top: 1-1/16" Hole
• Bottom: 1-5/8" Hole

Equivalent to:

• Pleatco: N/A
• Unicel: C-5622
• Filbur: FC-2015
• OEM: 27-077

This Filter Fits The Following Brands:

Premier Springwater, Romanesque, Rogers

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