Hot Tub / Spa Filters

1. Measure the outside diameter of the cartridge (in inches, +/- 1/32”).
2. Measure the cartridge length (in inches, +/- 1/16”) including end caps but excluding any handles or other extensions. If possible please try to measure through the center rather than along the outside edge.
3. Identify the cartridge outside edge end cap configuration using the chart on the Bottom of the Page. If the top and/or bottom is “open,” measure the inside diameter (in inches, +/- 1/32”) of the top and/or bottom.
4. Record the OEM name and model of the filter the cartridge came out of (if possible).
5. Count the number of pleats (+/- 2) and note whether there is a center core or not.

In order to assist you in finding the proper filter cartridge please fill out the form below and we will email you the link to purchase the correct filter.