AK-4035 aka Dream Maker Spas Filter OEM: 403575, Pleatco: PDM25P4, Diameter: 4-5/8", Length: 8-1/4"

Filter Specifications:

• Square Footage: 25 sq. ft.
• Media/Thickness: 3
• Diameter: 4-5/8"
• Length: 8-1/4"
• Top: Handle
• Bottom: 1-1/2" MPT

Equivalent to:

• Pleatco: PDM25P4
• Unicel: N/A
• Filbur: N/A
• OEM: 403575

This Filter Fits The Following Brands:

Dream Maker 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

How to measure a hot tub filter references:

Spa Care Center or Pool Care Center