Spa Filter Darlly: 40205, Baleen: AK-90081, OEM: N/A, Pleatco: N/A , Unicel: 4CH-920 , Filbur: FC-0124, Diameter: 4-5/8", Length: 6-3/4"

Filter Specifications:

• Square Footage: 20 sq. ft.
• Media/Thickness: 3
• Diameter: 4-5/8"
• Length: 6-3/4"
• Top: Handle
• Bottom: 1-1/4" SAE

Equivalent to:

• Pleatco: N/A
• Unicel: 4CH-920
• Filbur: FC-0124
• Darlly: 40205

This Filter Fits The Following Brands:

Saratoga 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