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30-Day Return
1-Year Warranty
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Free shipping
30-Day Return
1-Year Warranty
Clean Water. No Power Needed.
The Big Flow Tank 1 Gravity Water Filter System delivers clean, better-tasting water without electricity or plumbing. Designed with multi-stage filtration, including activated carbon, UF membrane filtration, fluoride reduction elements, and silver ion protection, it helps reduce chlorine, odors, fine particles, and unwanted impurities while improving water quality.
Built with durable stainless steel, a space-saving portable design, and a real-time water level window, it’s ideal for apartments, small kitchens, offices, travel, camping, and emergency use. The flexible 2-in-1 design allows you to use it in full size or convert it into a compact setup for easier storage and transport.
▪ 2-IN-1 FLEXIBLE DESIGN
▪ COMPACT GRAVITY FILTRATION SYSTEM
▪ NO ELECTRICITY REQUIRED
▪ MULTI-STAGE WATER FILTRATION
▪ REAL-TIME WATER LEVEL WINDOW
▪ STAINLESS STEEL CONSTRUCTION
▪ PORTABLE COUNTERTOP DESIGN
• Stainless Steel Upper Tank
• Stainless Steel Lower Tank
• Stainless Steel Lid
• Stainless Steel Faucet
• 2 × Activated Carbon Filter Cartridges
• 2 × Fluoride Filter Elements
• Stand Base
• Installation Tools (Wrench & Screwdriver)
Capacity: 3.8 Liters
Flow Rate: Up to 4 Gallons per Hour (filter pair)
Filter Lifespan: Up to 6,000 Gallons
Filtration Materials:
• Activated Carbon
• Silver Ions
• UF Membrane
• Fluoride Filter Element
Design: 2-in-1 Convertible Structure
Water Level Indicator: Transparent Viewing Window
Material: Stainless Steel
Installation: No electricity required
Usage: Countertop gravity filtration system
Just fill, filter, and enjoy clean water anywhere—perfect for home, travel, and everyday use.
Built-in display and viewing window let you easily check water level and system status—simple, clear, and easy to use every day.
Combines carbon, UF membrane, silver ions, and fluoride filter elements to help reduce chlorine, sediment, and unwanted contaminants.
Advanced multi-layer filtration works longer to keep your water fresh, clean, and consistent—day after day.
What Makes Us The Better Choice
Large capacity
Constant Refilling
Multi-stage filtration
Basic carbon only
Stainless steel
Plastic build
Long-lasting filters
Frequent replacements
Steady flow
Slow drip
Got a less-frequently asked question?
It reduces common concerns like chlorine, heavy metals, and everyday impurities—giving you cleaner, better-tasting water without complicated systems.
RO systems are more advanced, but this filter focuses on what matters most for daily use—improving taste and reducing common contaminants—without the cost, setup, or waste.
Unlike small pitchers, this system holds more water, filters more consistently, and doesn’t require constant refilling—making it better for daily use.
Use it at home, in apartments, offices, or take it on camping trips, RV travel, or emergencies—anywhere you need reliable clean water.
It’s built with food-grade stainless steel, so your water stays clean without plastic taste or material concerns over time.
No plumbing. No electricity.
Simple filters, long lifespan