# iSpring RCC7AK 6-Stage Reverse Osmosis System

> NSF/ANSI 58 certified 6-stage reverse osmosis system with alkaline remineralization stage. Removes chloramines, lead, PFAS, and 1,000+ contaminants. Lowest annual running cost of any pick at ~$67-70/yr.

- Brand: [iSpring](https://nontoxicnook.com/brands/ispring)
- Category: Kitchen › Small Appliances › [Water Filters](https://nontoxicnook.com/products/category/kitchen-water-filters)
- Price tier: $$$
- Canonical: https://nontoxicnook.com/products/ispring-rcc7ak-6-stage-ro

## Why we chose it

Six-stage RO with NSF/ANSI 58 certification for the full system (not just components) and an alkaline remineralization stage that restores minerals stripped by the RO membrane. At ~$67-70/yr, it has the lowest annual running cost of any pick in this guide. RO removes chloramine, PFAS, lead, fluoride, arsenic, and effectively everything else to 93-99% efficiency. The iSpring is the right choice when comprehensive contaminant removal matters more than installation simplicity.

## Certifications

- NSF/ANSI 58

## Specs

- filter-type: 6-stage reverse osmosis (RO) with alkaline remineralization
- certifications: NSF/ANSI 58 (full system)
- contaminants-reduced: 1,000+
- pfas-removal: 96-99% (RO certified)
- chloramine-removal: Yes (RO process)
- gpd: 75 GPD
- annual-filter-cost: ~$67-70/yr
- system-price: ~$250
- installation: Under-sink, DIY with quick-fit connections
- source:nsf-ansi-58: https://info.nsf.org/Certified/DWTU/Listings.asp?TradeName=iSpring
- image:source-url: https://www.amazon.com/dp/B005LJ8EXU
- image:credit: iSpring, via Amazon product listing

## Where to buy

- [Amazon](https://www.amazon.com/dp/B005LJ8EXU)

Prices are deliberately omitted from this mirror — they go stale. Current prices and stock: https://nontoxicnook.com/products/ispring-rcc7ak-6-stage-ro

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