Spa Filter Baleen: AK-90109, OEM: N/A, Pleatco: PMAX50P4 , Unicel: 5CH-35 , Filbur: FC-0300, Diameter: 5-5/8", Length: 8"

Filter Specifications:

• Square Footage: 35 sq. ft.
• Media/Thickness: 3
• Diameter: 5-5/8"
• Length: 8"
• Top: Handle
• Bottom: 1-1/2" MPT

Equivalent to:

• Pleatco: PMAX50P4
• Unicel: 5CH-35
• Filbur: FC-0300
• OEM:

This Filter Fits The Following Brands:

Elite Spas by Maax, Coleman

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