Hot Tub Spa Filter: AK-3053, OEM: 17-2633, Pleatco: PRB100 , Unicel: C-4999 , Filbur: FC-2397, Diameter: 4-15/16", Length: 26-11/16"

Filter Specifications:

• Square Footage: 100 sq. ft.
• Media/Thickness: 3
• Diameter: 4-15/16"
• Length: 26- 11/16"
• Top: 2-1/8" Hole
• Bottom: 2-1/8" Hole

Equivalent to:

• Pleatco: PRB100
• Unicel: C-4999
• Filbur: FC-2397
• OEM: 17-2633

This Filter Fits The Following Brands:

Rainbow Dynamic, Coast Spas, Sonoma, Baja

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