Omnipure cartridges can look very similar, so appearance alone is not a reliable way to choose a replacement. The safest approach is to identify the exact cartridge and confirm it against your equipment documentation.
1. Find the model code
Check the label printed on the cartridge. Codes such as Q5420 or Q5421 10M are more useful than colour, shape or packaging because they identify the specific product family and specification.
2. Check any filtration specification
Look for information such as micron rating, filter media and any performance information printed on the cartridge. Do not assume two cartridges with a similar body are interchangeable.
3. Check the physical connection
Compare the cartridge format and connection used by your current system. If you are uncertain, refer to the equipment manufacturer's replacement-filter list or service documentation.
4. Match the exact model where possible
If your existing cartridge is clearly marked Q5420, the simplest route is to replace it with the same model. The same principle applies to Q5421 10M and other Omnipure codes.
Current ODDSTOCKS filters
We currently stock the Omnipure Q5420 and Omnipure Q5421 10M. You can also browse the full Filters & Plumbing collection.
Buying filters in quantity
Businesses and maintenance teams needing repeat quantities can contact us through Bulk Buy & Trade for current stock availability.
Important: Always follow the equipment manufacturer's compatibility and installation guidance.