SLF Water Filtration Comparison at Best Buy · 2026
Waterdrop X8-PRO
Recommended for households prioritizing fast RO output, smart monitoring and stronger certification evidence over low purchase price.
Waterdrop G3P800
A strong premium choice for larger households that want substantially more output than the G3P600 while keeping a tankless footprint and adding built-in UV sterilization.
Waterdrop X8-PRO
Choose the X8-PRO if you want Waterdrop's 800 GPD premium RO platform with a smart dual-flow faucet and certified filtration performance.
RO Performance & Ownership
Compare RO output, filtration stages, remineralization, contaminant evidence, certifications and ownership cost.
Which Is Right for You?
Waterdrop X8-PRO
Best for: Households that want fast tankless RO output, smart monitoring and Waterdrop's dual-flow faucet system.
Consider if: High Daily Output, Want TDS Display
Waterdrop G3P800
Best for: Large households, high daily water use, tankless under-sink installations, PFAS concerns, and shoppers wanting UV plus smart water-quality monitoring.
Consider if: High Daily Output, Want TDS Display
Our Recommendation
Waterdrop X8-PRO
A premium, high-output tankless RO system with smart monitoring and meaningful third-party certification, but without remineralization.
Waterdrop G3P800
The Waterdrop G3P800 is worth considering for high-use households that want a premium tankless RO system with fast output, UV sterilization and smart monitoring. Its biggest drawbacks are price and the lack of built-in remineralization on the standard model.
The Short Answer
Choose the X8-PRO if you want Waterdrop's 800 GPD premium RO platform with a smart dual-flow faucet and certified filtration performance.
Choose the G3P800 if you want 800 GPD, UV sterilization and a more efficient 3:1 pure-to-drain ratio; choose a lower-capacity system if price matters more than maximum output.
Water Filter Comparison FAQs
Answers are generated from the current SLF product records for these two systems.
Which is better, Waterdrop X8-PRO or Waterdrop G3P800?
Waterdrop X8-PRO is the overall pick for this specific matchup. Choose the X8-PRO if you want Waterdrop's 800 GPD premium RO platform with a smart dual-flow faucet and certified filtration performance.
Which system has the higher daily filtration capacity?
Both systems have the same rated output in the current SLF records.
Which system offers remineralization?
Both systems are listed as no for remineralization in the current SLF records.
Which system has the lower MSRP?
Waterdrop X8-PRO has the lower MSRP in the current SLF records at $899.00, compared with $999.00 for the other system.
Do both systems require a plumbing connection?
Waterdrop X8-PRO: Yes. Waterdrop G3P800: Yes.
Which system is more renter friendly?
Waterdrop X8-PRO: No. Waterdrop G3P800: No. Check lease and plumbing-modification rules before installing an under-sink system.
What certifications are listed for these systems?
Waterdrop X8-PRO: Waterdrop states the X8-PRO is certified by IAPMO R&T against NSF/ANSI 42 and 58 for the reduction claims specified on its Performance Data Sheet and to NSF/ANSI 372 for low lead. Waterdrop G3P800: Waterdrop states the G3P800 is certified to NSF/ANSI 42, 53, 58 and 372. IAPMO R&T certification is cited for applicable NSF/ANSI standards.
How do estimated annual filter costs compare?
Waterdrop X8-PRO: $159.97. Waterdrop G3P800: $159.97. Actual replacement timing and prices can vary.
