Measuring a Spa Filter cartridge
If your filter cartridge does not have any markings or molded part numbers it is possible to take measurements to help us find a replacement.
B. Measure the overall length of the cartridge in inches (+/- 1/16"), including the end caps.
C. If the top and/or bottom is open, measure the inside diameter of the opening (+/- 1/16 inch).
D. Make note of the manufacturer (OEM) and model number of the filter the replacement cartridge will be installed.
Do not include any handles, strings, etc.
A more accurate measurement is made by measuring through the center of the cartridge when possible.
Match the cartridge end cap configuration {See below}.
Spa Cartridge Filters by brand.
End cap styles
