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Pure Water 3i+

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3i+ Water Purification System

Give yourself a BOOST!

PHSI Sterling Water Coolers’s newest system incorporates a fifth BOOST filter for the purest pH balanced and electrolyte enhanced water in the marketplace today.

Our industry-leading 3i Boost water purification system now satisfies America’s trending thirst for enhanced water. Sterling Water Coolers’s newest system incorporates a BOOST cartridge for the purest pH balanced and electrolyte enhanced water in the marketplace today.

It’s the Fresher, Healthier, Greener choice!


Reverse Osmosis Filtration

80 Gallon per day “green” reverse osmosis filtration system removes contaminants including Total Dissolved Solids (TDS). Leaving you with pure drinking water that is free of dirt, chemicals, metals, etc.

Activated Oxygen Injection

Activated oxygen raises the oxygen level of the water creating a more efficient and absorbent drinking water as well as delivering FRESHNESS YOU CAN TASTE™.

ATS-Auto Tank Sanitization

Eliminates the risk of microbiological contamination through adding activated oxygen to your drinking water. A solution that is highly effective, environmentally friendly and that always ensures you have safe, clean water.


The entire front panel and nozzle of our system is manufactured with an antimicrobial surface protecting you and your staff against cross-contamination of germs within the workplace.


Filter Replacement Notification Light

Notifies you as soon as the filter needs to be replaced by the Sterling Water Coolers service team — ensuring the highest quality of freshness.

Pure Touch Dispense

The ergonomic design delivers an optimum dispense height and spacious dispense area for large containers which prevents germ contamination of the dispense nozzle.

Dispense Area Light

Illuminates the dispense area (4 brightness options) to easily identify drip tray “bullseye” for precise dispensing — keeping the work environment clean of water spillage.

24-Hour System Monitoring

At the core of PHSI’s patented technology is a microprocessor that controls and monitors activated oxygen injection, filter life, water quality, and all other system functions 24 hours a day. Only the 3i can deliver this level of programmability and performance that keeps your water fresh and pure.


Superior Water Purification


Sterling Water Coolers water purification products take unfiltered water and put it through a filtration and purification process unmatched by our competition. Unlike other systems, our products use four filters*:

Sediment Filter | Carbon Block Filter | 80 GPD Reverse Osmosis Membrane | Carbon Block Filter | Activated Oxygen Filter


*In certain cases, the reverse osmosis filter may be substituted with a microfiltration layer.

Product Specifications

Dimensions (WxDxH): 14″ x 17″ x 50.5″
Dispense Height: 10.1″
Weight: 93 lbs.
Cold Tank Capacity: 3 gallons
Hot Tank Capacity: 0.5 gallons
Purification Process: Multi-stage process utilizing Sediment Removal, Dual Carbon, Reverse Osmosis (80 gallons per day) and Activated Oxygen Injection


Schedule a FREE One Week Trial

Free Trial Details:

Request a one-week FREE trial for your home or business and start enjoying the best drinking water on the planet.*

A Sterling Water Coolers representative will contact you about specific details regarding your installation date and time.

*Subject to an appointment with Sales Consultant.