RO Water

iSpring RCC7 Under Sink RO

The RCC7 is a 5-stage under-sink reverse osmosis system certified to NSF/ANSI 58, producing up to 75 gallons a day and reducing up to 99% of over 1,000 contaminants.
Buy On Amazon
Brushed nickel iSpring RCC7 five-stage under sink reverse osmosis system with storage tank on a light background

Five Stages Built for Reliable Daily Use

Each stage has a defined job, from sediment and carbon pre-filters through the reverse osmosis membrane to a final post filter, all packed into a housing sized 15.5 inches long by 5.1 inches wide and 18.0 inches high to fit most sink cabinets.

NSF/ANSI 58 Certified Components

The system is certified to NSF/ANSI 58, the standard covering reverse osmosis drinking water systems, giving you a documented basis for its contaminant reduction performance rather than a marketing claim.

Compact Under Sink Footprint

At 15.5 inches long, 5.1 inches wide and 18 inches high, the housing tucks beside a garbage disposal or cleaning supplies without crowding the cabinet or blocking access to the drain.

75 Gallons Per Day Output

Rated at 75 gallons per day, the unit keeps a household supplied through drinking, cooking and ice trays, refilling its storage tank steadily between the moments you draw water.

Five-stage reverse osmosis system installed inside an open kitchen sink cabinet with storage tank and tubing
Clear drinking water poured into a glass from the brushed nickel faucet of an under sink reverse osmosis system
Cleaner Water Daily

What Cleaner Drinking Water Looks Like

Glass of clean drinking water held beneath the brushed nickel faucet of the under sink reverse osmosis system

Purer Water From Every Kitchen Tap

Five stages of filtration ending in reverse osmosis are rated to reduce up to 99% of more than 1,000 contaminants, so what reaches your glass comes out noticeably cleaner.

Stovetop pot and coffee cup filled with reverse osmosis water for cooking and hot drinks

Better Taste in Drinking and Cooking

By removing sediment, chlorine and the taste and odor compounds that come with them, the system makes plain tap water and anything you brew or cook with it taste better.

Replacement filter cartridges lined up beside the under sink reverse osmosis system

Long Service With Simple Upkeep

Certification to NSF/ANSI 58 and a leak-free design mean the unit depends on routine filter changes only, keeping ownership predictable and low effort over years.

Under sink reverse osmosis system supplying a brushed nickel faucet that fills a glass, a cooking pot and a coffee cup on a kitchen counter

Where the RCC7 Fits Household Water Needs

Households on municipal water who want certified contaminant reduction at a single tap reach for this system for daily drinking water, cooking and ice, without the plumbing changes a whole-home unit would require.

Daily Drinking Water From One Point of Use

If your city supply carries chlorine taste or odor, the RCC7 treats water at a single point of use, giving you cleaner water for glasses and bottles without filtering every faucet in the house.

Cooking, Coffee and Ice Made With RO Water

Filling pots, brewing coffee and making ice with filtered water removes the taste compounds that carry through from tap water, so recipes and drinks come out tasting the way you intended.

Small Cabinets and Rental Kitchens Alike

The 15.5 by 5.1 by 18 inch housing plus a compact tank fits cabinets where space is tight, and the same fittings that simplified installation also make removal straightforward at move out.

Installing and Maintaining Your RCC7

Under sink reverse osmosis system being installed in a kitchen cabinet with tank, tubing and a wrench
Tape measure checking cabinet clearance next to an under sink reverse osmosis housing

Plan the Cabinet Before You Mount

Clear the space under the sink and confirm the housing, which measures 15.5 inches long, 5.1 inches wide and 18 inches high, plus the storage tank fit beside your disposal or supplies. Leave open floor in front so filter changes stay easy.

Hands twisting a white sediment filter cartridge out of the reverse osmosis housing

Change Filters on a Steady Schedule

Twist out the spent sediment and carbon cartridges when flow slows or the calendar calls for it, and keep the membrane on its longer replacement interval. Having spares on hand turns a twenty-minute job into a routine you stop dreading.

Dry cloth wiping tubing connections at an installed under sink reverse osmosis system

Check Connections After the First Flush

Run the system through its first tank fill, then wipe each joint and fitting with a dry cloth and re-check the next morning. Catching a slow drip at install time is far easier than finding one after the cabinet floor has absorbed it.

Owners on Daily Use

What RCC7 Owners Report

We put the RCC7 in over a weekend and the change was obvious by the next morning. Tap water stopped tasting like chlorine, our ice cubes came out clear and neutral, and the coffee tastes cleaner without a filter pitcher taking up counter space.
Decorative customer review avatar icon 1
Dana R.
Weekend install, better-tasting water by the next morning
Our cabinet already held a garbage disposal and a stack of cleaning supplies, so I measured twice before ordering. The housing fits beside both, and the tank tucks against the back wall with room left to reach the filters when service time comes around.
Decorative customer review avatar icon 2
Marcus T.
Fits a crowded cabinet without crowding the disposal
Four of us cook most nights and fill water bottles each morning. The tank refills steadily enough that we have not run it dry, and even after a heavy evening of filling pots and ice trays the faucet is ready again within a reasonable wait.
Decorative customer review avatar icon 3
Priya S.
75 gallons a day keeps up with a four-person household
I checked under the cabinet for a puddle every week for the first month and found nothing at all. A year of daily use later the connections are still dry, which takes a real worry off my mind with water lines running near wood flooring.
Decorative customer review avatar icon 4
Ken W.
No leaks after a full year of daily use
Before buying I wanted more than a marketing claim. Seeing the NSF/ANSI 58 certification for reverse osmosis systems gave us a documented reference point, and the taste results at our own kitchen sink have matched what we expected so far.
Decorative customer review avatar icon 5
Lena M.
Certification gave us a documented basis to trust

Common Questions Answered

Answers to the questions buyers ask most about space, certification, daily output and ongoing upkeep before choosing this system.
The housing measures 15.5 inches long, 5.1 inches wide and 18.0 inches high, plus a storage tank and tubing. Measure your cabinet first and leave clear room in front for filter changes.
It is certified to NSF/ANSI 58, the standard covering reverse osmosis drinking water systems, and it is rated to reduce up to 99% of more than 1,000 contaminants.
Rated at 75 gallons per day, it refills its storage tank steadily so a household has water on hand for drinking, cooking and ice, though heavy draws may outpace refill briefly.
Routine filter changes are the main task, and owners report replacement filters stay reasonably priced. A leak-free design keeps upkeep simple, and support can help when a part needs attention.
Verified owners report running their units anywhere from several years to roughly a decade with regular filter changes and basic care, a useful benchmark when comparing long-term cost.
Reverse osmosis system with its replacement filter cartridges laid out on a kitchen counter for review

Keep Comparing Water Treatment Options

If you are still weighing storage tank tradeoffs or comparing filter stages, our related guides walk through output rates, cabinet footprint and routine upkeep so you can match the RCC7 to your household’s water habits before you decide.
Under-sink reverse osmosis water filtration system with stacked filter housings and blue tubing beside a faucet pouring clear water into a glass

iSpring Water Filter

Compare iSpring reverse osmosis drinking systems, whole-house filters, and softening options to match your water problem, household size, and installation space with certified models.

Modern kitchen scene with clear drinking water poured into a glass beside an undersink reverse osmosis unit and a whole-house filter housing

iSpring Water Systems

Compare iSpring reverse osmosis drinking systems, whole-house filters, and softening setups side by side, then match capacity, stage count, and coverage to your water and your home.

The iSpring RCC7AK six-stage under-sink reverse osmosis system with white filter housings, storage tank, tubing and faucet on a light countertop

iSpring Rcc7ak

The iSpring RCC7AK is an NSF/ANSI 58 certified 6-stage reverse osmosis system that remineralizes water for superb-tasting drinking water.