With such a huge range of cartridge filters available online, finding a replacement for your particular application can be a bit daunting. Here we explain how to correctly measure your existing cartridge filter, which helps to narrow down your search.

You need to take three measurements into account

• Overall Length
• Diameter
• Hole Diameter

We'll format it this way:

Overall Length x Diameter x Hole Diameter

The best way to ensure you are purchasing the right filter cartridge for your application is to match up the new cartridges dimensions with your existing cartridge you are looking at replacing.

Yes, this involves taking your old cartridge out of its housing and measuring it with a tape measure.

These dimensions are listed in the description of each and every one of our filters.

Measure through the inside hole from one side to the other, this will ensure any small lips around the hole are included in the measurement, which may change the length.

Measure the top of the filter directly from one side to the other.

Measure the filter hole from one side to the other.

Then, marry up your appropriate cartridge on the below table, starting with the Overall Length. Note all measurements are in mm (millimetres).

SEE ALSO: How to Choose the Best Cartridge Filter for Your Pool

Tip: To extend the life of your cartridge, give it a thorough clean every couple of months. Give it a good hose down then soak it overnight in a tub of clean water with some of our specially formulated Zodiac Filter Cleaner for a good 12 hours. After soaking, give it a good rinse and it should be good as new!

Even though they can be much smaller, spa cartridges run off the same pool cartridge filter measuring principle as above. The only thing you'll have to look out for to ensure you're purchasing the right one (if it applies to your cartridge) is the thread; they either come in fine or course. Some spa cartridges do not have threads.

Can't find your cartridge model on our list up top or in our shop? There's a chance that they're no longer in production. Maybe it's time to move on and replace your filter set with something newer an more efficient.

• Water TechniX Cartridge Filter Eclipse CF75 (75 sq ft):
  • Suitable for pools with a volume UP TO 60,000 liters.
  • Recommended flow rate: More than 167 LPM.
• Water TechniX Cartridge Filter Eclipse CF100 (100 sq ft):
  • Ideal for pools with a volume of around 80,000 liters.
  • Recommended flow rate: More than 200 LPM.
• Water TechniX Cartridge Filter Eclipse CF150 (150 sq ft):
  • Perfect for larger pools with a volume exceeding 100,000 liters.
  • Recommended flow rate: More than 267 LPM.

Here’s why we recommend the Water TechniX Eclipse Filters:

1. Reliability and Consistency:

   • The Eclipse series has consistently delivered exceptional performance. Our customers rely on it year after year and our reviews back it up.

2. Availability:

   • We understand the frustration of waiting for essential pool equipment. That’s why we keep the Eclipse filters, cartridges, and spare parts always in stock. (And if it's not in stock, rest assured that there's stock coming, always)
   • No more delays—when you need a replacement or an upgrade, we’ve got you covered.

3. Parts and Cartridges:

   • Eclipse filters come with a robust ecosystem of replacement parts and cartridges.
   • Need a new O-ring, a pressure gauge, or a filter element? We’ve got them readily available.
   • Our commitment to providing comprehensive support ensures your pool stays crystal clear.

We have compiled one of the largest libraries of pool maintenance guides on the internet. To see them, just click on the button below.

Do you have any questions about this topic or the featured products? No worries, we're here to help! Head over to our Contact Us page and drop our friendly team of pool pro's a line.