Original manufacturer option
iSpring F28K75 alkaline maintenance supply with membrane
Filter F28K75
Your search matches the manufacturer’s listed filter identifier.
Before you buy
Includes the six RCC7AK stages and spare cartridges for later changes. Install only the stages that are due, not every cartridge at once. No UV lamp is included. The larger pack is not automatically better value; check storage guidance and the full price including shipping.
Why this filter
What’s included
Includes 6 FP15 sediment filters, 6 FG15 granular-carbon filters, 6 FC15 carbon-block filters, one MC7 membrane, 3 FT15 final-carbon filters and 6 FA15 alkaline filters.
How this compares
This is a checked replacement, not a Best Overall or Best Value winner yet. Before choosing a winner, we need other filters we can trust, a fair comparison of how they work and how reliable they are, and current prices including shipping.
Filtration tests and details
These records explain which filter results we have checked and what their limits are. The same certification name does not mean two filters work equally well.
What we have verified about filtration
We have not yet verified the exact model's health-related contaminant reductions against a current independent certification listing. Manufacturer claims alone do not establish that this filters better than another option.
View sources
These sources explain the fit, features and filter test results described above. They are not retailer price checks.
Installation and care
Caring for the filters
Sold as a three-year supply, not a guarantee of that service life. Keep unused cartridges sealed. The manufacturer says each is individually wrapped, but no specific unopened shelf-life duration is established here. Follow the instructions for each stage.
For RCC7P-AK: the manual lists this as a maintenance supply. Replace the stages that are due and keep the remaining cartridges for later changes. The package name does not guarantee a fixed lifespan for every stage.
Where to buy
We haven’t confirmed a current price and availability for this filter. Shopping comparisons are not available yet.