Water Filter Cartridges Sizes

Whether you're upgrading, replacing, or customising your filtration setup, our comprehensive size selection streamlines the process, allowing you to effortlessly identify and acquire the filter cartridges that meet your unique filtration needs.

Replacement filter cartridges aren't one size fits all. The industry has settled on a handful of standard sizes that the vast majority of housing systems are built around, and finding the right cartridge is really just a matter of matching the dimensions to your existing setup.

We stock the four most common sizes: 10" standard (10" x 2.5"), 10" jumbo (10" x 4.5"), 20" standard (20" x 2.5"), and 20" jumbo (20" x 4.5"), across a wide range of filter types including sediment, carbon block, GAC, GAC/KDF, ceramic, and refillable cartridges.

The Importance of Getting the Right Size

Fitting the wrong size cartridge is an easy mistake to make, and it's one that causes problems even if the cartridge physically fits into the housing.

A cartridge that's too narrow will allow water to bypass the filter media entirely rather than passing through it, which means contaminants go through unfiltered. Beyond fit, the size of the cartridge determines how much filter media it contains and, in turn, how long it lasts before needing replacement.

Jumbo cartridges hold considerably more media than their standard counterparts, which makes them better suited to higher flow applications or situations where you want to extend the time between changes. The 20" length doubles the media volume compared to a 10" cartridge of the same diameter, which is why 20" options are common in many whole house and commercial setups where throughput is higher.

Alternative Shopping Paths

If you’re not sure what drinking water filter sizes to choose, explore alternative methods to refine your search and discover the ideal product for your water filtration needs. You can also:

• Shop by brand

• Shop by type

Questions about your order? Contact our knowledgeable team today. We're here to help!

FAQs

What sized drinking water filter do I need?

Determining the right size for your drinking water filter depends on various factors such as water usage, the number of people in your household, and specific filtration needs.

Common sizes include 5-inch, 10-inch standard, 10-inch jumbo, 20-inch standard, and 20-inch jumbo. Consider your water consumption and the space available for the filter.

If you have specific requirements or would like some more help, feel free to reach out to our team for personalised guidance in selecting the ideal filter size for your drinking water needs.

How to Choose the Right Size

Check your existing filter housing first. The size will usually be printed on the housing itself or in the documentation that came with it. If you're not sure, measure the internal chamber length and diameter and match those to the cartridge dimensions. For under-sink and drinking water systems, 10" standard is by far the most common size. For whole house systems, pond applications, or anywhere with higher flow demands, 10" jumbo or 20" jumbo cartridges tend to be ideal.