Spa Filter Baleen: AK-6004, OEM: N/A, Pleatco: PTL50XW-OB , Unicel: C-7400 , Filbur: FC-3098, Diameter: 7", Length: 14-3/4"

Filter Specifications:

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

Equivalent to:

• Pleatco: PTL50XW-OB
• Unicel: C-7400
• Filbur: FC-3098
• OEM:

This Filter Fits The Following Brands:

Gold Key

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