NSF 58/42 · EPA Certified
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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.
Enjoy fresh, better-tasting water anywhere with the Big Flow Tank 3 Gravity Water Filter System. Designed with activated carbon, UF membrane filtration, and silver ion protection, this stainless steel countertop water filter helps reduce chlorine, odors, and fine particles while improving everyday water quality — no electricity or plumbing required.
Its compact, space-saving design, real-time water level window, and durable stainless steel build make it ideal for apartments, small kitchens, offices, travel, camping, and emergency use. Use it in full size or compact mode for flexible everyday convenience.
• 1.5 Gallon Capacity — Compact size with enough clean water for everyday use.
• No Electricity Needed — Gravity-fed filtration works without power or plumbing.
• Multi-Stage Filtration — Activated carbon, silver ions, and UF membrane help improve water quality and taste.
• Stainless Steel Design — Durable, rust-resistant housing built for long-term use.
• Portable & Space-Saving — Great for apartments, kitchens, offices, travel, and emergency backup.
• Water Level Window — Easily check remaining water at a glance.
• Stainless Steel Upper Tank ×1
• Stainless Steel Lower Tank ×1
• Stainless Steel Lid ×1
• Stainless Steel Faucet ×1
• Filter Cartridges ×2
• Stand Base ×1
• Installation Accessories ×1
Capacity: 1.5 Gallon (3.8L)
Flow Rate: Up to 3 Gallons/Hour (per pair)
Filter Lifespan: Up to 6,000 Gallons
Material: Stainless Steel
Filtration Materials: Activated Carbon + Silver Ions + UF Membrane
Installation: No Electricity Required
Design: Countertop Gravity Water Filter
Long-Lasting Filtration Performance
The filter system is designed for reliable daily use with a lifespan of up to 6,000 gallons per filter pair, depending on water quality and usage conditions. Multi-stage filtration helps reduce chlorine, odors, sediment, and fine particles for cleaner, better-tasting water.
Carbon Filter: 6–12 months
Filter Materials:
• Activated Carbon — helps reduce chlorine, taste, and odor
• Silver Ions — supports cleaner filtration performance
• UF Membrane — helps reduce fine particles and impurities
Just fill, filter, and enjoy clean water anywhere—perfect for home, travel, and everyday use.
Combines carbon, UF membrane, and silver ions to help reduce chlorine, sediment, and unwanted contaminants.
Built-in display and viewing window let you easily check water level and system status—simple, clear, and easy to use every day.
Advanced multi-layer filtration works longer to keep your water fresh, clean, and consistent—day after day.
NO POWER NEEDED
Gravity filtration—clean water without electricity or setup
PORTABLE ANYWHERE
Compact size—easy to carry for camping, RVs, and trips
Reliable Water Flow
More Water, Less Refilling
FOOD-GRADE STAINLESS STEEL BUILD
Safe materials—no plastic taste, built for long-term use
SUPPORTS DAILY WELLNESS
Clean water helps your body stay balanced and hydrated
SAFER FOR FAMILY USE
Reliable water for kids, cooking, and daily drinking
NO POWER NEEDED
Gravity filtration—clean water without electricity or setup
PORTABLE ANYWHERE
Compact size—easy to carry for camping, RVs, and trips
Reliable Water Flow
More Water, Less Refilling
FOOD-GRADE STAINLESS STEEL BUILD
Safe materials—no plastic taste, built for long-term use
SUPPORTS DAILY WELLNESS
Clean water helps your body stay balanced and hydrated
SAFER FOR FAMILY USE
Reliable water for kids, cooking, and daily drinking
Got a less-frequently asked question?
The multi-stage filtration system helps reduce chlorine, sediment, rust, odors, and fine particles while improving overall water taste. Performance may vary depending on local water conditions.
The system uses gravity-fed filtration, meaning water naturally flows through the filter without electricity or plumbing. Simply add water to the upper chamber and let gravity do the work.
Gravity water filters are simple, portable, and reliable. They require no electricity, no plumbing, and minimal setup, making them ideal for homes, apartments, travel, and emergency preparedness.
Filter lifespan depends on water quality and usage. Normally around 6 months. For best performance, replace filters according to the recommended usage period or when flow rate slows noticeably.
ECO First
Patent Certified