Spa Filter Baleen: AK-40041, OEM: 59901, 58601, Pleatco: PIN28 , Unicel: C-5330 , Filbur: FC-3748, Diameter: 5-3/4", Length: 12"

Filter Specifications:

• Square Footage: 30 sq. ft.
• Media/Thickness: 3
• Diameter: 5-3/4"
• Length: 12"
• Top: 1-7/8" Hole
• Bottom: 1-7/8" Hole

Equivalent to:

• Pleatco: PIN28
• Unicel: C-5330
• Filbur: FC-3748
• OEM: 59901, 58601

This Filter Fits The Following Brands:

Intex Type "D", Krystal Klear and Wet

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