Glacier Fresh Reverse Osmosis

Enjoy cleaner, better-tasting water straight from your tap with the GlacierFresh U03 800 GPD Reverse Osmosis System. Designed for powerful filtration without taking over your under-sink space, the U03 combines advanced 5-stage reverse osmosis filtration with a compact, non-electric design for reliable purified water whenever you need it.

With an impressive 800 gallons-per-day capacity and a rated flow of 0.6 GPM, the U03 delivers purified water quickly — ideal for filling drinking glasses, water bottles, coffee makers, kettles and cooking pots without the long wait associated with many traditional RO systems.

Its advanced 5-stage filtration system uses sediment filtration, activated carbon and a premium reverse osmosis membrane to help reduce unwanted contaminants including TDS, chlorine, lead, fluoride, arsenic, heavy metals, PFAS/PFOS, microplastics and other impurities.

The U03 also features an innovative internal tank design, allowing the complete system to measure just 13.6″ W × 8.3″ D × 16.5″ H (345 × 210 × 420 mm). GlacierFresh states that the compact design can save up to 70% of under-sink space compared with traditional reverse osmosis systems.

Because the system operates without electricity, there is no electric booster pump constantly running, helping provide quiet, energy-efficient operation while continuing to supply purified water even during a power outage.

Key Features

• 800 GPD High-Capacity Performance – Produces purified water quickly for everyday drinking, cooking and food preparation.
• Advanced 5-Stage Filtration – Multi-stage purification helps reduce TDS, chlorine, lead, fluoride, arsenic, heavy metals, PFAS/PFOS, microplastics and other contaminants.
• 99.99% Contaminant Reduction – GlacierFresh states the system can remove or reduce up to 99.99% of impurities.
• Compact Internal Tank Design – Saves valuable cabinet space while eliminating the need for a bulky traditional external RO tank.
• Space-Saving Size – Measures only 13.6 × 8.3 × 16.5 inches (345 × 210 × 420 mm).
• No Electricity Required – Operates using incoming water pressure, helping reduce energy use and allowing continued operation during power outages.
• Quiet Operation – No electric booster pump means significantly less operating noise than many traditional electric RO systems.
• Efficient 3:1 Pure-to-Drain Ratio – Produces approximately three parts purified water for every one part wastewater, helping reduce water waste.
• Fast 0.6 GPM Flow Rate – Provides purified water quickly when filling glasses, bottles, pitchers and cookware.
• 1,427-Gallon Rated Total Capacity
• Easy Filter Replacement – Filters are designed to be quickly removed and replaced without complicated tools.
• Long-Lasting RO Membrane – RO filter replacement is typically recommended every 12–24 months, depending on water quality and usage.
• NSF Certified & SGS/CSA Tested – Designed and tested to meet recognized filtration safety and performance standards.
• Premium Faucet Included – Completes the installation with a clean, modern look.
• Designed for Municipal Water Supplies

Designed for Everyday Life

Whether you’re filling your morning coffee, cooking dinner, washing produce, preparing baby formula, filling your pet’s water bowl or simply grabbing a cold glass of water, the GlacierFresh U03 provides convenient access to purified water directly from your kitchen.

Its combination of high output, advanced filtration, efficient water usage and compact size makes it an excellent choice for homeowners who want the benefits of reverse osmosis without sacrificing valuable cabinet space.

Product Specifications

Model: GFU03
Filtration: 5-Stage Reverse Osmosis
Daily Capacity: Up to 800 GPD
Rated Flow: 0.6 GPM / 1.5 L/min
Pure-to-Drain Ratio: 3:1
Rated Total Capacity: 1,427 gallons
Dimensions: 13.6″ × 8.3″ × 16.5″
Metric Dimensions: 345 × 210 × 420 mm
Inlet Pressure: 0.25–0.7 MPa
Operating Water Temperature: 41–100°F / 5–38°C
Ambient Temperature: 39–104°F / 4–40°C
Power Required: None
Recommended Water Source: Municipal Water

Cleaner water. Less wasted space. No electricity required.