Spa Filter Baleen: AK-3005, OEM: CL-2807, CL-2810, Pleatco: PMT50 , Unicel: C-4305 , Filbur: FC-1630, Diameter: 4-15/16", Length: 14-7/8"

Filter Specifications:

• Square Footage: 50 sq. ft.
• Media/Thickness: 3
• Diameter: 4-15/16"
• Length: 14-7/8"
• Top: 2-1/8" Hole
• Bottom: 2-1/8" Hole

Equivalent to:

• Pleatco: PMT50
• Unicel: C-4305
• Filbur: FC-1630
• OEM: CL-2807, CL- 2810

This Filter Fits The Following Brands:

Martec, Cal Spa, Sonfarrel, Advantage

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