SLF Water Filtration Comparison · 2026
BOROUX Legacy
Recommended for households wanting premium, installation-free gravity filtration.
Waterdrop TK-AB-FS
Recommended for renters and families who want a high-capacity countertop system with no plumbing, no electricity and dedicated fluoride-reduction media.
Waterdrop TK-AB-FS
Choose the TK-AB-FS for portable, no-installation gravity filtration and fluoride reduction; choose a certified RO system if TDS, PFAS or maximum contaminant reduction is the priority.
Gravity Countertop Filtration & Ownership
Compare gravity-fed filtration evidence, water capacity, filter longevity, footprint and ongoing ownership cost.
Which Is Right for You?
BOROUX Legacy
Best for: Families, Renters, and households wanting high-capacity gravity filtration without installation.
Consider if: Limited Counter Space, Avoid Plumbing, Renting
Waterdrop TK-AB-FS
Best for: Families, Renters, Apartments, RVs, camping and emergency preparedness where plumbing and electricity are unavailable.
Consider if: Avoid Plumbing, Renting, Budget Under $300
Our Recommendation
BOROUX Legacy
Strong premium choice for families and renters who prefer gravity filtration over plumbed or powered systems.
Waterdrop TK-AB-FS
A strong renter-friendly and emergency-preparedness choice for chlorine, taste, odor and fluoride concerns, provided buyers understand that NSF 372 does not establish lead-removal performance.
The Short Answer
Choose it for high-capacity gravity filtration without plumbing; add Proactive Filters if fluoride reduction is a priority.
Choose the TK-AB-FS for portable, no-installation gravity filtration and fluoride reduction; choose a certified RO system if TDS, PFAS or maximum contaminant reduction is the priority.
Water Filter Comparison FAQs
Answers are generated from the current SLF product records for these two systems.
Which is better, BOROUX Legacy or Waterdrop TK-AB-FS?
Waterdrop TK-AB-FS is the overall pick for this specific matchup. Choose the TK-AB-FS for portable, no-installation gravity filtration and fluoride reduction; choose a certified RO system if TDS, PFAS or maximum contaminant reduction is the priority.
Which system offers remineralization?
Both systems are listed as no for remineralization in the current SLF records.
Which system has the lower MSRP?
Waterdrop TK-AB-FS has the lower MSRP in the current SLF records at $199.99, compared with $399.00 for the other system.
Do both systems require a plumbing connection?
BOROUX Legacy: No. Waterdrop TK-AB-FS: No.
Which system is more renter friendly?
BOROUX Legacy: Yes. Waterdrop TK-AB-FS: Yes. Check lease and plumbing-modification rules before installing an under-sink system.
What certifications are listed for these systems?
BOROUX Legacy: WQA certified to NSF/ANSI 42, NSF/ANSI/CAN 401, and NSF/ANSI/CAN 372. Waterdrop TK-AB-FS: The carbon filters included with the Waterdrop TK-AB-FS are certified by IAPMO R&T to NSF/ANSI 42 for chlorine, taste, and odor reduction and to NSF/ANSI 372 for lead-free material requirements. The certification applies to the filter components and does not verify every system-level contaminant claim. NSF/ANSI 372 confirms material lead-content requirements; it does not certify lead reduction from drinking water. Waterdrop also states that the filtration system was tested by a third-party laboratory. No certification to NSF/ANSI 53, 58, or 401 was identified, and WQA certification could not be confirmed.
How do estimated annual filter costs compare?
BOROUX Legacy: $139.00. Waterdrop TK-AB-FS: $94.99. Actual replacement timing and prices can vary.