Spa Filter Darlly: 40651, Baleen: AK-9008, OEM: 1561-06,1561-07, Pleatco: PTL65H-P4 , Unicel: 4CH-65 , Filbur: FC-0171, Diameter: 4-5/8", Length: 19-5/8"

Filter Specifications:

• Square Footage: 65 sq. ft.
• Media/Thickness: 3
• Diameter: 4-5/8"
• Length: 19-5/8"
• Top: Handle
• Bottom: 1-1/2" MPT

Equivalent to:

• Pleatco: PTL65H-P4
• Unicel: 4CH-65
• Filbur: FC-0171
• OEM: 1561-06, 1561-07
• Darlly: 40651

This Filter Fits The Following Brands:

Dimension One, @Home Hot Tubs

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