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iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis System

Name: iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis System
Brand: iSpring
Price: 241.99 USD

Reverse osmosis · Not stated · Treats pfas · $242 at iSpring as of Oct 2026

The iSpring RCC7AK is a six-stage under-sink reverse osmosis system for drinking water at one faucet, not the whole house: sediment filter, two carbon filters, RO membrane, post-carbon and an alkaline remineralization filter (the RCC7 drops that stage). NSF's own database lists the RCC7AK under NSF/ANSI 58 for TDS reduction only. iSpring's page quotes NSF-certified reductions for asbestos (over 99.7%), barium (98.4%), cadmium (98.8%), chromium (99.2%), copper (97.8%), fluoride (97.4%), lead (98.9%), selenium (99.0%) and TDS (97.9%), but NSF lists those contaminant claims for the RCC7AK-BN and RCC7AK-BLK faucet-finish variants, not the plain RCC7AK. PFAS reduction is a manufacturer claim outside any certified figure. Nitrate and nitrite are not mentioned on the product page, so we do not list it for nitrates.

The membrane is rated 75 gallons per day with a 3.2-gallon tank (NSF's listing gives a certified daily production rate of 21.04 gpd); the manual sets feed limits of 45-70 psi and 750 ppm TDS. iSpring quotes 6-12 months on the sediment, carbon and alkaline filters and 2-3 years on the membrane. It is 15.5 x 5.1 x 19 in. and 25 lb.

Price was $241.99 at ispringfilter.com as of Oct 2026 (regular price). Install is DIY with push-fit connectors and 1/2 in. NPT or 3/8 in. compression feed adapters. Warranty is 1 year and requires registration; technical support is lifetime.

Check price at iSpring

iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis System well water reverse osmosis

Specifications

Verified 2026-10-06. Fields the manufacturer does not publish are marked “Not stated”.

iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis System specifications
Model	RCC7AK (75 GPD, alkaline remineralization). RCC7AK-BN and RCC7AK-BLK are faucet-finish variants; RCC7 is the same system without the alkaline stage; RCC7AK-UV adds a UV stage.
Type	Reverse osmosis
Treats	PFAS; also fluoride, lead, arsenic, asbestos, barium, cadmium, chromium, copper, selenium, mercury, PCBs, chlorine, total dissolved solids
Service flow	Not statedUnder-sink point-of-use system; no GPM service flow is published (production is rated in gallons per day, see capacity). RCC7-series manual operating conditions: inlet water pressure 45-70 psi (3.1-4.8 bar; pressure regulator above that, booster pump below), water temperature 40-100F, pH 2.0-11.0, maximum TDS 750 ppm, maximum chlorine 2.0 ppm.
Capacity	Not stated75 GPD (gallons per day): the product page says the system can 'filter up to 75 gallons per day' and 'The storage tank can hold 3.2 gallons'. Filter life per the page FAQ: FP15 sediment, FG15 GAC, FC15 carbon block, FT15 post-carbon and FA15 alkaline filters every 6-12 months; MC7 RO membrane every 2-3 years. NSF's listing gives a certified daily production rate of 21.04 gpd for the RCC7AK, well below the marketed 75 GPD membrane rating.
Media / technology	Sediment filter, two carbon filters, reverse osmosis membrane, post-carbon, alkaline remineralization filter
Stages	6
Connection	1/2 in. NPT and 3/8 in. compression feed adapters
Installation	DIY'Designed for DIY installation and all necessary parts for installation are included'; push-fit quick connectors ('push tubing 1/2 in. deep'), 1/2 in. NPT and 3/8 in. compression feed adapters, no electricity.
Warranty	1-year manufacturer warranty'1-year limited manufacturer warranty upon registration'; optional paid 3-, 5- and 10-year extended warranties sold on the product page. iSpring offers lifetime technical support.
Certifications	NSF/ANSI 58 (TDS reduction; NSF listing)NSF listing for the exact model (info.nsf.org, read 2026-10-06), iSpring Water Systems LLC, 'Plumbed-In to Separate Tap': 'RCC7AK \| replacement modules FP15, FG15, FC15, FT15, MC7 \| Daily Production Rate 21.04 gpd \| TDS Reduction'. That is a TDS-reduction claim only, with no NSF/ANSI/CAN 372 mark. NSF lists the asbestos, barium, cadmium, trivalent chromium, copper, fluoride, lead and selenium claims (and 372) for the RCC7AK-BN and RCC7AK-BLK variants (25.41 gpd), so the percentages iSpring prints on this product page are certified figures for those variants, not for the plain RCC7AK. Maker wording on the product page: 'Certified by NSF/ANSI 58 - The iSpring reverse osmosis system is tested and certified by NSF International against NSF/ANSI to standard 58 for reduction of Asbestos (>99.7%), Barium (98.4%), Cadmium (98.8%), Chromium (99.2%), Copper (97.8%), Fluoride (97.4%), Lead (98.9%), Selenium (99.0%), TDS (97.9%)' and 'Our NSF Certification validates the entire filtration system's performance, setting us apart from competitors that certify only components or materials'. Page FAQ: 'RCC7AK is certified to NSF/ANSI 58 for TDS reduction'. RCC7-series manual: 'RCC7 Series conforms to NSF/ANSI 58 for the specific performance claims as verified and substantiated by test data'; its certification footnote spells out RCC7-BN / RCC7-BLK / RCC7AK-BN / RCC7AK-BLK / RCC7AK-UVBN / RCC7AK-UVBLK / RCC7UV as 'Tested and Certified by NSF International against NSF/ANSI Standard 58 for reduction of Asbestos, Barium, Cadmium, Chromium (Trivalent), Copper, Fluoride, Lead, Selenium, TDS' (plain RCC7AK is asterisked in the adjacent table but not written out in the footnote). Nitrate/nitrite and PFAS are not among the certified claims; the PFAS statement on the page is a maker claim. The certification is NSF's, not WQA's: WQA certified-product search (find.wqa.org) returned zero results for 'iSpring', 'iSpring Water', '123Filter', 'WGB32B' and 'RCC7AK' on 2026-10-06 (a control search for 'Culligan' returned listings).
Dimensions	15.5 x 5.1 x 19 in.
Weight	25 lb
Price	$242 at iSpring as of Oct 2026

Published features

Certified by NSF to NSF/ANSI 58 for TDS reduction (NSF listing for the RCC7AK)
75 GPD 6-stage system with alkaline remineralization
Transparent 1st stage housing for easy visual inspection
Electricity-free operation
Push-fit quick connectors; no threading pipes needed
Compatible with most refrigerators
3.2-gallon storage tank and faucet included

Pros and cons

Pros

Whole system (not just components) is listed by NSF under NSF/ANSI 58, for TDS reduction
Maker states PFAS (PFOA/PFOS) reduction
75 GPD membrane and alkaline remineralization stage
DIY push-fit install; sibling RCC7 drops the alkaline stage for a lower price

Cons

Nitrate/nitrite reduction is not claimed on the product page, so it cannot be recommended for nitrates on this site
Only a 1-year warranty, and it requires registration
PFAS claim is marketing, not part of the NSF/ANSI 58 certified claims
Feed limits appear only in the manual (45-70 psi inlet pressure, 750 ppm maximum TDS), not on the product page
NSF's listing for the plain RCC7AK certifies TDS reduction only; the fluoride, lead and other percentages on iSpring's page are listed by NSF for the RCC7AK-BN/-BLK variants

Our take

The RCC7AK is the pick if you want a whole system that NSF itself lists under NSF/ANSI 58 and a DIY push-fit install at a mid-range price; for the plain RCC7AK that listing covers TDS reduction only, and the fluoride and lead figures iSpring publishes are NSF-listed for the RCC7AK-BN and -BLK variants. It is not the pick for nitrates, which iSpring does not claim, and its PFAS claim is marketing rather than a certified result. The 1-year warranty needs registration. For a nitrate result, the Aquasana SmartFlow carries the certification this one lacks.

Not sure it is the right size for your flow and your water test? Work through the sizing guide, or compare every system we cover on the best well water filtration systems (2026) list.

Where to buy

$242 at iSpring as of Oct 2026. Prices change; the links open the current listing.