SLF Water Filtration Comparison at Best Buy · 2026
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 X16
A premium pick for large households that want exceptionally high 1600 GPD output, certified RO filtration, alkaline remineralization, and a smart TDS-monitoring faucet.
Depends on Your Priorities
The measurable advantages are split in this matchup, so the better choice depends on the features you value most.
RO Performance & Ownership
Compare RO output, filtration stages, remineralization, contaminant evidence, certifications and ownership cost.
Which Is Right for You?
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
Waterdrop X16
Best for: Large households and high-demand users wanting premium tankless RO, alkaline remineralization, and smart faucet controls.
Consider if: Want Remineralization, Want TDS Display
Our Recommendation
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.
Waterdrop X16
The Waterdrop X16 is best suited to large or high-use households willing to pay a premium for exceptional output, advanced RO filtration, alkaline remineralization, and smart monitoring.
The Short Answer
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.
Choose the X16 when maximum flow, alkaline remineralization, and premium smart features matter more than purchase price.
Water Filter Comparison FAQs
Answers are generated from the current SLF product records for these two systems.
Which is better, Waterdrop G3P800 or Waterdrop X16?
There is no single winner for every household. The current SLF records show meaningful trade-offs, so the better choice depends on filtration, output, installation, features and ownership cost.
Which system has the higher daily filtration capacity?
Waterdrop X16 has the higher rated output: 1600 GPD versus 800 GPD.
Which system offers remineralization?
Waterdrop G3P800: No. Waterdrop X16: Yes.
Which system has the lower MSRP?
Waterdrop G3P800 has the lower MSRP in the current SLF records at $999.00, compared with $1,999.00 for the other system.
Do both systems require a plumbing connection?
Waterdrop G3P800: Yes. Waterdrop X16: Yes.
Which system is more renter friendly?
Waterdrop G3P800: No. Waterdrop X16: No. Check lease and plumbing-modification rules before installing an under-sink system.
What certifications are listed for these systems?
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. Waterdrop X16: Waterdrop states the X16 is certified to NSF/ANSI 42, 58 and 372; IAPMO R&T certification is stated for NSF/ANSI 58 reduction claims on the Performance Data Sheet and NSF/ANSI 372.
How do estimated annual filter costs compare?
Waterdrop G3P800: $159.97. Waterdrop X16: $182.97. Actual replacement timing and prices can vary.
