Spa Filters by Measurements  

If you don't know the name of your spa, and do not know any product codes for it, one of the best ways to identify a replacement is by taking some basic measurement and comparing to the data shown below.  Take measurements of the length, outer diameter, the diameter of any holes or thread attachments.  If you still can't find the right filter, measure the area where your filter attached to the hot tub to see how much leeway is allowed, and then searching within these parameters.