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GLACIER FRESH GFU03 Electric-Free Reverse Osmosis Water Filter 800 GPD
✅ In stock
F
Grade
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 31, 2026 8:28 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
GlacierFresh Home
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓TankInside Design: GLACIER FRESH GFU03 internal tank reverse osmosis system features a water-powered structure, requiring no electricity with near-silent operation. This all-in-one design removes the need for an external tank and saves up to 70% of under-sink cabinet space, replacing bulky external storage tanks. It reduces electrical safety risks and fits most under-sink installations.
✓5-Stage Filtration: Under-sink Tankless reverse osmosis system meets NSF/ANSI 58, 372, and 401 standards, employing a precise multi-stage filtration system to effectively remove including PFOA, PFOS, chlorine, lead, fluoride and other heavy metals, as validated by independent testing. So every drop is clean, safe, and fresh-tasting, for a cleaner, better-tasting drinking experience.
✓800 GPD Fast Flow: This 800 GPD high-flow system provides purified water to meet water demands for large households. It features a built-in real-time water pressure gauge to help maintain stable system performance. Note: Actual flow rate varies based on incoming water pressure. A minimum inlet pressure of 40 PSI is recommended; lower pressure will reduce flow output.
✓3:1 Pure-to-Drain Ratio: The GFU03 Tankless Reverse Osmosis System features an impressive 3:1 pure-to-waste water ratio—producing just one cup of wastewater for every three cups of purified water—far more efficient than systems with 1:1 or 1:2 ratios. This not only saves you money but also reduces water waste and supports more sustainable water use.
✓30 Minute Quick Installation: This undersink water filter system can be installed in just 30 minutes, half the time of traditional tank-style systems (2–4 hours). Includes all adapters and tool-free connectors. Note: This product requires drilling a 1/2"-1" diameter hole in the sink to prepare for faucet installation.
✓Easy-Replace Filter: The filter cartridge adopts a pull-out design. Before removing the filter, shut off the inlet water valve and drain residual water inside the unit. Note: Flush the filter cartridge under running water for 10–20 minutes after initial installation and each filter replacement.
✓High‑Precision 0.0001μm RO Membrane: Equipped with premium 0.0001μm RO membrane, filters out ultra‑fine impurities for outstanding water purity. Advanced membrane technology brings clean, sweet‑tasting drinking water for your whole household.
✓Check Cabinet Space Before Installation: GFU03 measures 13.58" L × 8.27" W × 16.54" H (345 × 210 × 420 mm). Please measure your under-sink space and leave extra room for water connections, tubing, and filter replacement.
⚙️ Specifications
Brand
GLACIER FRESH
Special Feature
5-stage Filtration, No Drilling, No Electric Drive, Tankless, Water Saver Technology
Product Dimensions
13.58"L x 8.27"W x 16.54"H
Material
1. System Cover: Plastic, 2. Faucet: Stainless steel, 3. RO Filter: Reverse Osmosis Membrane Filter, 4. C Filter: Granular Carbon Filter, 5. PPC Filter: Composite Carbon Filter
Capacity
800 gallons
Included Components
RO System, RO/C/PPC Filter, Faucet, PE pipes, Feed Water Adapter
Package Information
Tankless Ro System
Installation Type
Under Sink
Purification Method
Carbon Block, Reverse Osmosis
Power Source
No Electric Drive
Other Special Features of the Product
5-stage Filtration, No Drilling, No Electric Drive, Tankless, Water Saver Technology
