Spa Filter Darlly: 40254, Baleen: AK-3010, OEM: CX225RE,57010500, Pleatco: PA225-4 , Unicel: C-4325 , Filbur: FC-1220, Diameter: 4-5/8", Length: 11-7/8"

Filter Specifications:

• Square Footage: 25 sq. ft.
• Media/Thickness: 3
• Diameter: 4-5/8"
• Length: 11-7/8"
• Top: 2-1/16" Hole
• Bottom: 2-1/16" Hole

Equivalent to:

• Pleatco: PA225-4
• Unicel: C-4325
• Filbur: FC-1220
• OEM: CX225RE 57010500
• Darlly: 40254 

This Filter Fits The Following Brands:

Hayward

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