Spa Filter Darlly: 40501, Baleen: AK-30056, OEM: 179192, Pleatco: PIC50N , Unicel: C-4351 , Filbur: FC-0184, Diameter: 4-1/4", Length: 23-3/4"

Filter Specifications:

• Square Footage: 50 sq. ft.
• Media/Thickness: 3
• Diameter: 4-1/4"
• Length: 23-3/4"
• Top: Handle
• Bottom: 2-15/16" Hole

Equivalent to:

• Pleatco: PIC50N
• Unicel: C-4351
• Filbur: FC-0184
• OEM: 179192
• Darlly: 40501

This Filter Fits The Following Brands:

Icon Spas Models 631 616 615 628, Grecian, Discovery

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