Older Delphi filters
Your Delphi may have been part of your daily routine for years. If you arrived looking for a replacement filter, start here to identify the older product family and consider a next step. Check the older-model filter directory for Delphi listings and current availability. An H2 upgrade is also an option if you are considering a new machine.
No need to guess based on a filter name alone.
First, identify what you used
They are useful clues to your previous setup—not a promise that a current H2 cartridge fits your older ionizer.
This UltraWater cartridge appeared in several older ionizer listings, including Delphi, Athena, Melody, and old Jupiter models. Use your machine label—not just the cartridge name—to identify the relevant old-model guide. It was a legacy replacement filter; an H2 upgrade is a new ionizer with its own filter system.
BioStone Plus was listed for most older Jupiter/Emco machines and for the right-side second filter position on the old Athena. Vesta GL had a separately named BioStone Plus product, so this shared listing should not be treated as a universal Vesta filter. Identify your old machine before comparing an H2 upgrade.
The .01M UF name appeared across multiple older-machine listings. It identifies a former ultrafiltration cartridge, not a current H2 part. Check your ionizer model and use the Delphi, Athena, Melody, or Jupiter/Emco guide to find an appropriate next step.
Customers who used Remineralizer Max may have chosen it for low-mineral water or as part of an older reverse-osmosis setup. Discuss your water source and existing installation with a specialist before selecting a new H2 machine.
Important compatibility note
H2 Series replacement filters are designed for H2 Series machines. Do not order one for an older ionizer without checking compatibility with AlkaViva.
The older Delphi filter category included UltraWater, BioStone Plus, .01M UF, and Remineralizer Max choices. These products belonged to older machines and are not the same as replacement filters made for the H2 Series. If you do not know the exact model or filter position, check the label on your existing unit.
An H2 upgrade replaces the ionizer rather than swapping an H2 cartridge into your old Delphi. If your current machine is an undersink installation, review the Delphi H2 as one new-machine option and confirm installation needs and suitability with AlkaViva. If a countertop arrangement would suit you better, compare Athena 9 H2 and Athena 7 H2 as separate machines.
H2 Series replacement filters are designed for H2 Series machines. Do not order one for an older ionizer without checking compatibility with AlkaViva.
Clear answers
Still not certain? Have your machine name or a photo ready when you call.
775-324-2400Do not assume so. The similar model name does not make generations interchangeable. Confirm your machine and the correct filter with AlkaViva instead of ordering by name alone.
Have a photo of the front and model label ready when you call. A specialist can help identify the older machine and discuss an H2 setup for your home.
A helpful conversation starts with what you know
We can help you make sense of the older machine and talk through current options.
