Both BOROUX systems share the same gravity-fed filtration technology and WQA-certified Foundation Filters. The difference is in capacity, footprint, and who they're built for.
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Legacy 3G
Available
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Legacy Compact
Available
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Foundation Filters
Available
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Fluoride Add-On
Available
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|---|---|---|---|---|
| Capacity | 3 Gallons | 1.8 Gallons | — | — |
| Dimensions | 23"H × 9"D | 17.5"H × 8"D | 9" length | — |
| Filter capacity | Up to 12–24 months | Up to 12 months | 12,000 gal / pair | 1,000 gal / pair |
| Flow rate | 2–4 GPH | Up to 2 GPH | — | — |
| Contaminants removed | 80+ up to 99.97% | 80+ up to 99.97% | 80+ up to 99.97% | Fluoride up to 99.9% |
| Certification | WQA · NSF/ANSI 42, 401, 372 | WQA · NSF/ANSI 42, 401, 372 | WQA · NSF/ANSI 42, 401, 372 | Tested 3rd party |
| Power | None — gravity fed | None — gravity fed | — | — |
| Warranty | Lifetime (chambers) | Lifetime (chambers) | 1 year | — |
| Best for | Families · everyday use | Apartments · small kitchens | Replacement · compatible systems | Fluoride reduction add-on |
| View More ↓ | View More ↓ | View More ↓ | View More ↓ |
HSA/FSA eligible at checkout. All BOROUX systems ship free on orders over $60. 101-day satisfaction guarantee. BOROUX devices are wellness filtration tools — not medical devices. Not available for California or Iowa residents (Fluoride Filters).
BOROUX Legacy™
Family-Scale Filtration.
Zero Compromises.
Twenty years of filtration expertise in a single, elegant countertop system. The Legacy delivers certified clean water for up to eight people — no electricity, no installation, no ongoing plastic waste.
Overview
The BOROUX Legacy is a gravity-fed countertop water filter system built from seamless 304 AISI stainless steel. With a 3-gallon capacity and up to four Foundation Filters, it delivers a flow rate of 4 gallons per hour — enough for a household of eight, with filters that last up to 24 months.
Unlike plastic pitcher-style filters or systems reliant on power and installation, the Legacy needs nothing except water poured from the top. Its vented lower chamber prevents airlocks, its ceramic-valve spigot delivers a steady flow, and its one-piece domed lid keeps things clean and low-profile at 23 inches tall.
What it removes
- Lead, mercury, chromium, and other heavy metals
- PFAS / PFOA "forever chemicals" and industrial compounds
- Chlorine, chloramines, and disinfection byproducts
- Microplastics ≥ 0.5 µm (NSF/ANSI/CAN 401 certified)
- Pesticides, herbicides, VOCs, and pharmaceuticals
- Fluoride — with optional Proactive™ Fluoride Filter add-on
Filter configurations
Add the Proactive™ Fluoride Filter to either configuration for up to 99.9% fluoride reduction — no alumina, dual-layer nano-carbon design.
Technical Specs
- Capacity3 Gallons
- Dimensions (assembled)23"H × 9"D
- Dimensions (nested)15"H × 9"D
- With stand29"H × 9"D
- Flow rate2 GPH (2 filters) · 4 GPH (4 filters)
- Filter modelBX·FND9·2 Foundation Filters
- CertificationsWQA · NSF/ANSI 42, 401, 372
- Material304 AISI Stainless Steel · ceramic valve · silicone seals
- PowerNone — gravity fed
- Finish optionsPolished Stainless · Matte Black · Matte White · Sage Green
- WarrantyLifetime (chambers, spigot, hardware)
- OriginUSA (filters) · China (stainless chambers)
What's in the box
- Lid, upper chamber, lower chamber, base ring
- 2 or 4 BOROUX Foundation Filters (your choice)
- Stainless steel spigot with ceramic valve
- 2 hole plugs, wingnuts, food-grade silicone washers
- Canvas tote bag
- Setup guide
Legacy™ Compact
Same Filtration.
Smaller Footprint.
Every capability of the Legacy system — certified filtration, stainless steel construction, long-life filters — in a 17.5-inch profile designed to fit under kitchen cabinets and into the tightest of spaces.
Overview
The Legacy Compact brings BOROUX's full filtration performance to apartments, small kitchens, RVs, dorm rooms, and offices. At 17.5 inches tall and 8 inches wide, it slides under most standard kitchen cabinets — eliminating one of the biggest objections to countertop filter ownership.
It uses the same two full-size Foundation Filters as the 3-gallon system, delivers the same certified contaminant reduction, and comes with the same lifetime warranty on its stainless steel chambers. The integrated base design eliminates the loose rubber ring of earlier systems for a cleaner, more durable profile.
Ideal for
- Apartments and compact kitchens — fits under standard cabinets
- 1–4 person households filled once or twice daily
- Offices, studios, and shared workspaces
- RVs, vacation homes, and travel use
- Anyone seeking Legacy performance without Legacy footprint
Technical Specs
- Capacity1.8 Gallons
- Dimensions17.5"H × 8"D
- Flow rateUp to 2 GPH
- Filters included2 BOROUX Foundation Filters
- Filter lifespanUp to 12 months
- CertificationsWQA · NSF/ANSI 42, 401, 372
- Material304 AISI Stainless Steel · ceramic valve · silicone seals
- PowerNone — gravity fed
- Finish optionsPolished Stainless · Matte Black · Matte White · Sage Green
- WarrantyLifetime (chambers, spigot, hardware)
What's in the box
- Legacy Compact upper and lower chambers
- 2 BOROUX Foundation Filters
- Stainless steel spigot with ceramic valve
- Washers, wingnuts, and setup guide
Foundation™ Filters
The Core of Every
BOROUX System.
Every BOROUX system runs on Foundation Filters — a proprietary activated-carbon block independently tested to remove 80+ contaminants and certified by the WQA. Replacements are available as a standalone purchase and are compatible with most gravity-fed systems.
Foundation™ Filter
- ModelBX·FND9·2
- Filter length9 inches · 3/8" stem hole
- Capacity per pairUp to 12,000 gallons / 12 months
- Contaminants reduced80+ up to 99.97%
- MediaActivated carbon block (USA made)
- CertificationsWQA · NSF/ANSI 42, 401, 372
- CompatibilityBOROUX Legacy · Berkey® · ProOne® · Alexapure · Doulton · and more
- Warranty1 year from purchase
Proactive™ Fluoride Add-On
- Fluoride reductionUp to 99.9%
- Capacity per pairUp to 1,000 gallons
- MediaDual-layer nano-carbon · aluminum-free
- InstallationThreads onto Foundation Filter stem · hangs in lower chamber
- ShellReusable stainless steel shell included
- Pairing1 Fluoride Filter per Foundation Filter (1:1 ratio)
- AvailabilityNot available in California or Iowa