Spa Filter Darlly: 81008, Baleen: AK-70000, OEM: 74817, Pleatco PWK100 , Unicel: C-8300 , Filbur: N/A, Diameter: 8", Length: 16-1/2"

Filter Specifications:

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

Equivalent to:

• Pleatco: PWK100
• Unicel: C-8300
• Filbur: N/A
• OEM: 74817

This Filter Fits The Following Brands:

Caldera Spas

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