Recommended by Dominick Plumbing
Waterdrop Reverse Osmosis System
Tankless RO with great-tasting water — our top under-sink pick for Scottsdale kitchens.
- Licensed & Insured · ROC #350819
- Pro install & warranty
Why we recommend it
Waterdrop Reverse Osmosis System — our honest take
The Waterdrop G3 P800 (and G2 / G3P600) tankless reverse osmosis systems are the under-sink RO units we install most in Scottsdale, Paradise Valley and Phoenix. A 3-stage filter stack, 800 GPD on-demand production, smart faucet with TDS readout, and an ultra-low 1:1 drain ratio — far more water-efficient than legacy 4:1 tank systems.
- Removes the tannic / chlorinated taste from Scottsdale municipal water
- Knocks Scottsdale's 18–22 gpg minerals down to <10 TDS at the faucet
- Tankless = more cabinet space and zero stagnant water
- Filter changes are tool-free twists — homeowners can DIY between visits
Key features
What you're getting
- Tankless design — no bulky pressure tank under the sink
- Up to 800 GPD on-demand production (no waiting for the tank to refill)
- Smart LED faucet shows real-time TDS (water quality)
- 1:1 pure-to-drain ratio — saves thousands of gallons vs. legacy RO
- Composite filter stack — fewer changes, easy twist-in replacement
- NSF/ANSI 58, 372 & 42 certified for contaminant reduction
Specs at a glance
Waterdrop Under-Sink Reverse Osmosis specifications
- System type
- Tankless reverse osmosis (multi-stage)
- Production rate
- Up to 800 GPD (G3 P800)
- Drain ratio
- 1:1 pure-to-drain (industry-leading)
- Stages
- 3-stage composite (CF + RO + post-carbon)
- Certifications
- NSF/ANSI 58, 372, 42
- Warranty
- 1-year limited (full system)
FAQs
Common questions
Do I need a reverse osmosis system in Scottsdale?
If you don't love the taste of Scottsdale tap water, buy bottled water, or want to remove fluoride, chlorine, lead, arsenic and dissolved solids from your drinking and cooking water — yes. RO is the gold standard for drinking-water filtration, and the Waterdrop G3 takes Scottsdale's 400–600 TDS tap down to single digits.
Waterdrop vs APEC, iSpring, or Culligan RO?
Waterdrop's tankless design is a real upgrade over APEC and iSpring tank systems — no pressure tank to take up cabinet space, no stagnant water sitting for days, and the 1:1 drain ratio wastes far less water than the 3:1 or 4:1 of older designs. Beats Culligan on price-to-performance with no proprietary filters.
How much does Waterdrop RO installation cost in Scottsdale?
Most Scottsdale Waterdrop RO installs run $650–$1,100 fully supplied and installed under the kitchen sink, including the smart faucet, drain saddle, and cold-water tap. Add $150–$250 if we run a line to the fridge for ice and water.
How often do I change the filters?
Composite (CF) filter every 6 months, RO membrane every 24 months, post-carbon every 12 months — the smart faucet tells you when. Total filter cost is roughly $130–$170/year, less than bottled water for a single month.
Should I pair the Waterdrop RO with a softener?
Yes — pairing the Waterdrop RO with the Encore Reveal softener at the main extends RO membrane life dramatically (Scottsdale's hardness is brutal on RO membranes). The softener handles whole-home scale; the RO handles drinking-water taste and contaminants.