Support
Filter Replacements
How replacement works
- 01
Identify the system
Use the model or serial label on the unit, your paperwork, or send us a photo.
- 02
Confirm the cartridge
We match the exact cartridge to your configuration rather than a generic equivalent.
- 03
Schedule or ship
Choose a service visit or have filters sent for a straightforward swap.
Replacement intervals depend on water quality and usage as much as time. If your water has changed or usage has increased, the interval usually shortens.
What affects your interval
- Incoming water quality, including sediment and hardness
- Household size and daily water usage
- Whether the system serves the whole property or a single point of use
- How long the current cartridge has already been in service
- Any recent change to the water source, such as a well or municipal shift
Common situations
If you are not sure when the filter was last changed, that is fine. Tell us what you are seeing, such as reduced flow or a change in taste, and we will help you figure out whether it is due.
If you inherited a system from a previous owner, send us a photo of the unit and its label. We can usually identify the configuration from that alone, without needing a purchase record.
We will not guess at a compatible cartridge if we are not confident in the match. Using the wrong filter can affect performance, so we confirm first.
Published pricing
Replacement intervals and cost by system
| System | Replace | Cost | Who performs it |
|---|---|---|---|
| Pure Alkaline undersink | Annually or 2,000 gallons | $199.99 | Homeowner — no technician required |
| Delphi H2 undersink | Every 1,000 gallons | $190.00 | Homeowner — no technician required |
| PureHome whole-home | 250,000–500,000 gallons | Quoted at service | Liquid Tec technician |
| PureWell (well water) | 1,000,000 gallons | Quoted at service | Liquid Tec technician |
Related
- Warranty questions
- Start a warranty question
- Care guidance
- Manuals & care