Waterdrop lineup
Waterdrop's product catalog covers three filtration tiers: entry-level countertop filters (N1, A1 series -- carbon block, no RO), mid-tier countertop RO (D6 series -- RO membrane, tankless, countertop), and premium under-sink RO (G3 series -- high GPD, smart display, dedicated faucet). Waterdrop is the market leader in the countertop RO category, having effectively created the mainstream market for this format.
Best for comprehensive filtration: G3P800
The G3P800's 800 GPD capacity, smart TDS monitoring, and dedicated faucet make it the right choice for households where heavy metal contamination, high TDS, or fluoride removal are the primary concerns. Under-sink installation is more complex than countertop, but the flow rate and dedicated faucet are more convenient for daily use.
Best countertop RO: D6
The D6 at $300-$450 is the right choice for renters or households who can't install an under-sink system, or for secondary filtration locations (a home office, a bedroom, a workshop) where filtered water is wanted without full plumbing integration. The 0.3 GPM flow rate is the main limitation -- plan for 30 seconds per liter at the dispensing tap.
Best value entry: N1
For households where the water quality concern is taste and odor (chlorine) rather than heavy metals or TDS, the N1 at $50-$80 with no plumbing required is the most accessible entry point. It's a better solution than a Brita pitcher (larger capacity, pressurized flow) at the same price point.