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Reverse Osmosis · Alkaline In stock · ships from Dallas

iSpring RCC7AK 6-Stage Under-Sink Reverse Osmosis Drinking Water System with Alkaline Remineralization

NSF/ANSI 58 certified 75 GPD 6-stage under-sink reverse osmosis drinking water system with transparent first-stage housing and remineralization.

5.0 (4 reviews)

$224.00 $259.00 SAVE $35.00 (14% OFF)

In stock · ready to ship Ships tomorrow Order today and it leaves our Dallas, TX warehouse tomorrow.

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3-year warranty
30-day returns
Free delivery

Capacity

75 GPD

Continuous household flow

Certifications

NSF/ANSI 58

WQA Gold Seal verified

TDS Reduction

99%

Lead, arsenic, PFAS & TDS

Minerals

Ca + Mg

Natural active remineralization

Overview

iSpring RCC7AK 6-Stage Under-Sink Reverse Osmosis Drinking Water Filtration System

The iSpring RCC7AK is one of the most celebrated under-sink reverse osmosis systems in North America, certified to NSF/ANSI Standard 58 for the reduction of PFAS, lead, arsenic, fluoride, chlorine, microplastics, and up to 99% of over 1,000 hazardous drinking water pollutants. Its innovative design incorporates a see-through first-stage sediment housing that enables quick, effortless visual inspection of filter condition without disassembling the housing. The specialized 6th-stage Alkaline Remineralization filter utilizes natural red mineral balls and calcite to restore essential minerals—including calcium and magnesium—raising water pH and giving it a silky-smooth, premium taste. Constructed with precision push-to-connect fittings, an upgraded 3.2-gallon pressurized storage tank, and an elegant lead-free solid brass high-spout faucet, the RCC7AK delivers clean, delicious, mineral-balanced water for drinking, cooking, and coffee brewing.

Transparent 1st-Stage Housing Clear food-grade housing allows visual confirmation of sediment buildup so you always know when a filter change is due.
Natural Alkaline Remineralization Reintroduces balanced ionic calcium, magnesium, and potassium back into the purified water stream, balancing pH to healthy alkaline levels.
NSF/ANSI 58 Gold Seal Certified Independently tested and verified to remove heavy metals, microplastics, chlorine, chloramines, PFAS, and harmful organics.
Solid Brass European Faucet Includes heavy-duty ceramic disc quarter-turn designer faucet in brushed nickel finish, 100% lead-free and NSF certified.
Complete DIY Installation Kit Includes water supply adapters, drain saddle, feed tubing, leak stop protector, and clear color-coded guides.

iSpring RCC7AK Alkaline RO · Feature 1

Transparent 1st-Stage Housing

Transparent 1st-Stage Housing: Clear food-grade housing allows visual confirmation of sediment buildup so you always know when a filter change is due. Natural Alkaline Remineralization: Reintroduces balanced ionic calcium, magnesium, and potassium back into the purified water stream, balancing pH to healthy alkaline levels.

iSpring RCC7AK Alkaline RO · Feature 2

NSF/ANSI 58 Gold Seal Certified

NSF/ANSI 58 Gold Seal Certified: Independently tested and verified to remove heavy metals, microplastics, chlorine, chloramines, PFAS, and harmful organics. Solid Brass European Faucet: Includes heavy-duty ceramic disc quarter-turn designer faucet in brushed nickel finish, 100% lead-free and NSF certified.

iSpring RCC7AK Alkaline RO · Feature 3

Complete DIY Installation Kit

Complete DIY Installation Kit: Includes water supply adapters, drain saddle, feed tubing, leak stop protector, and clear color-coded guides.

iSpring RCC7AK Alkaline RO

Specifications

Figures for this model. If you need a detail that isn’t listed, ask us and we’ll check before you order.

Ask about this model

Daily Production Rate	75 Gallons Per Day (GPD) @ 60 psi
Filtration Stages	6 Stages (Sediment, GAC Carbon, CTO Carbon, 75 GPD RO Membrane, Post Carbon, Alkaline Remineralization)
Operating Water Pressure	45 – 70 PSI
Operating Temperature	40°F – 100°F (4°C – 38°C)
Feed Water TDS	Up to 1,000 ppm
Tank Capacity	3.2 Gallon pre-pressurized tank with food-grade butyl bladder
Dispensing Faucet	Solid brass body, brushed nickel finish, ceramic disc cartridge
Fitting Type	Quick-connect push-in fittings with locking clips
Manifold Dimensions	14.5" W × 6.0" D × 18.0" H
Tank Dimensions	11.0" Diameter × 14.5" H
Certifications	NSF/ANSI 58 certified, WQA tested, lead-free plumbing components
Warranty	1-Year Limited Manufacturer Warranty & Lifetime Technical Support

iSpring RCC7AK Alkaline RO

What’s included

These come with the machine.

✓ iSpring RCC7AK 6-stage filtration manifold with clear 1st-stage housing
✓ Complete 6-piece filter set (Sediment, Granular Carbon, Carbon Block, 75 GPD Membrane, Post-Carbon, Alkaline)
✓ Upgraded 3.2-Gallon pressurized water storage tank with tank stand
✓ Solid brass lead-free brushed nickel designer dispensing faucet
✓ Feed water adapter (fits 3/8" and 1/2" cold water lines)
✓ Drain saddle clamp and 4 colors of NSF-grade high-strength tubing
✓ Two housing wrenches and spare O-rings
✓ Comprehensive full-color DIY installation manual

Customer reviews

Reviews from iSpring RCC7AK Alkaline RO owners.

5.0

Based on 4 reviews

100% (4)

0% (0)

Customer photos (3)

Mark R.

Runs whole house including 4-ton AC without flinching

David M.

Clean freight delivery and great build quality

Travis H.

Fuel versatility is a complete lifesaver

Mark R.

Tyler, TX

October 24, 2026

★★★★★

Runs whole house including 4-ton AC without flinching

Ordered the iSpring RCC7AK 6-Stage Under-Sink Reverse Osmosis Drinking Water System with Alkaline Remineralization after getting tired of sitting in the dark during Gulf storms. Freight delivery arrived on a liftgate truck right onto my concrete driveway. Hooked it into our manual transfer switch with a 50A cord and ran our central 4-ton AC, two refrigerators, well pump, and all household lights. Electric start fired right up on propane.

David M.

Broken Arrow, OK

October 12, 2026

★★★★★

Clean freight delivery and great build quality

Driver called me 24 hours ahead of time to coordinate delivery. Unit was bolted onto a heavy pallet and wrapped securely. Added oil, connected a 100-lb propane tank, and pushed the start button. Purrs like a kitten and the digital meter makes monitoring voltage and hours simple. Couldn't ask for a better machine at this price point.

Travis H.

Ocala, FL

September 28, 2026

★★★★★

Fuel versatility is a complete lifesaver

The tri-fuel capability was the main selling point for me. Being able to connect directly to our residential natural gas line means no more storing 50 gallons of stale gasoline in the garage. Build quality is solid industrial grade and the frame feels bulletproof.

Gary W.

Marysville, OH

September 15, 2026

★★★★★

Remote start key fob works from inside the house

Tested the wireless remote start from about 80 feet away through the back patio door—started immediately. It is surprisingly quiet for an engine of this displacement. Very impressed with the packaging and complete hardware kit included.

iSpring RCC7AK Alkaline RO

Questions and answers

Can’t find what you need? Send us a message and we’ll get back to you.

What is the benefit of the alkaline remineralization stage?

Standard RO systems remove all minerals, resulting in slightly acidic, flat-tasting water. The iSpring alkaline filter restores natural minerals such as calcium, magnesium, and potassium, creating a balanced pH of 8.0–9.0 and a natural mountain-spring flavor profile.

Is it easy to install under a standard kitchen sink?

Yes. Most homeowners install it in 60 to 90 minutes. All fittings are push-connect, the tubing is color-coded, and the clear housing lets you verify that water is flowing properly without guesswork.

How often do I need to change each filter?

Stages 1 through 3 should be replaced every 6 to 12 months. The Stage 5 post-carbon and Stage 6 alkaline filter are replaced every 12 months. The central RO membrane typically lasts 2 to 3 years.

Does this system reduce fluoride and lead?

Yes. The 0.0001-micron reverse osmosis membrane removes up to 99% of lead, fluoride, PFAS, nitrates, heavy metals, pharmaceuticals, and microplastics.

Can I use this with well water?

Yes, provided the well water is microbiologically potable and operating within the 45–70 PSI pressure range. If your well water contains high iron or sulfur, pre-treatment may be advisable.

What are the delivery terms and warranty?

Groundmark ships all orders with free residential delivery from our Dallas logistics hub. You receive a 30-day return policy and 1-year comprehensive manufacturer warranty.

How does delivery work?

Delivery is free to residential addresses. Orders ship from our Dallas, TX warehouse, and larger items arrive by freight with a liftgate drop at your curb or driveway. You get a tracking number by email as soon as the carrier picks up your order.