Complete Home Filtration installs three main system formats across Australian homes. Use our quick checker to identify yours and confirm whether PW Series replacement filters are designed for your housing format — before you order.
Answer two quick questions about your existing CHF housings and we'll tell you which PW filters fit.
Look under your kitchen sink or in your garage / laundry — count the cylindrical blue (sometimes white) housings connected in a row.
Measure or estimate the length of one housing — bottom cap to top cap. A standard kitchen ruler placed against it gives you an approximate length.
The three CHF housing formats you'll find in Australian homes. PW Series replacement filters are designed for the 15" × 4.5" proprietary whole-home format — the most common CHF installation.
The most common CHF installation. Three 15" × 4.5" housings connected in series — sediment, scale, carbon block.
Less common — uses standard 20" × 4.5" Big Blue format. Open-market replacement cartridges already available.
Compact CHF drinking water system — usually filters just the kitchen tap, not the whole home.
Most CHF installations have a label or sticker identifying the system model. It's usually in one of three places.
Look at the top cap of one of the housings — there's often a sticker with the CHF logo and model number printed in small text.
The metal or plastic bracket the housings are attached to often has a CHF identification label, especially on installs done after 2020.
Check the original installation invoice or service log book — the model number is usually listed there. CHF customers also receive an annual service reminder showing model details.
Can't find a label? Not sure whether your filters are 15" or 20"? Snap a photo of your housings — including a ruler or familiar object for scale if you can — and we'll identify your system and confirm compatibility within 24 hours.
No commitment. We'll just tell you what you've got and whether PW Series filters fit.
If you've got the 15" × 4.5" CHF whole-home format, PW Series filters fit straight in.
Complete Home Filtration and CHF are trademarks of their respective owners. Proper Water is not affiliated with, endorsed by, or sponsored by Complete Home Filtration. PW Series replacement filters are independently designed for compatibility with standard 15" × 4.5" filter housings. All comparative pricing based on Complete Home Filtration's publicly published rates as of 2025.