Hot Tub Filters: How to Find the Right One

So you need a new hot tub filter, but you just checked online and it seems like the most daunting task. There are thousands of filters and they all seem to look the same. White pleated mesh stuff with blue plastic ends right? Aren’t they all the same? What’s with all the numbers and differences?

We’re here to tell you that all those options for hot tub filters are out there for a reason. Every single one is different, so don’t just guess and have to reorder the right one a second time. Take 20 minutes to measure your filter and find the correct one. Easier said than done, but with our guide you shouldn’t have too many issues. Let us break down how to find the proper filter on our website.

Step 1: Does is have a part number?

Check to see if your filter has a number on one of the ends. It usually either starts with a letter and then a series of numbers or is just a series of numbers. Whatever that number or code is, look it up on our website and see if anything comes up. Better yet, type that part number into our filter finder to see if anything shows up. If you get results, then measure your hot tub according to the following steps to make sure it all matches up.

Step 2: Identify the End Caps

If you couldn’t find a part number or our website didn’t come up with any results, then you’ll have to start breaking down the details. The first thing to do is identify the end caps. There are 10 different types of ends caps on our filter matrix for you to choose from: Open, open with slots, closed, SAE thread, male thread, male slip, castle, handle, cone, and loop handle. There are many more than 10 types of caps out there, but we chose these because they seem to be the most common ones that come up. If you see your two types of end caps on our filter matrix then go ahead and choose those two and move on to the next step. If you don’t see your end caps then you’ll have to move to the next step and enter your measurements. Below shows a variety of the types of ends caps possible.

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Step 3: Measuring

It is best to measure the filter to the most exact measurements you can get. They can vary by eighths of an inch and that can make a difference in whether it will fit. The two major measurements for the filter are the height and the diameter. The height is measuring from end cap to end cap. The diameter is the length across the widest part of one end cap. Here is what that looks like:

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If you can’t identify your hot tub filter by these two measurements and the end caps, then you might have to take other measurements too. Check for the inner diameter of the end cap if it is an open end cap or open thread. If you have a threaded end cap then you may even want to measure the size of the thread. Gather as much information as you can. Sometimes, if can be difficult to figure out what to measure so if you are still struggling then ask your local spa dealer to help you out.

Step 4: Try looking it up by manufacturer, model, and year

If you have the make, model, and year of your hot tub then you might be able to use that to look up what kind of hot tub filter you have. If you go to your local spa dealer you might be able to look through one of their filter books and locate your filter that way. If you look online at Filbur, Pleatco, or Unicel, sometimes they post replacement guides that have a catalogue of all their available filters. Do a find on the document with your spas information and see what it comes up with. Narrow down the results with your measurements you took previously.

Hope this helps you get started looking for the proper filter. You should always take measurements and be sure you’re getting the right filter before buying. If you have any questions about how to measure your filter or find the right one, our customer service agents would be happy to help you out.

One Response to “Hot Tub Filters: How to Find the Right One”

  1. Buds Spas says:

    I love the end cap illustration! Your article makes it very easy to identify and find the right filter. Thanks for sharing.

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