Buy Waterdrop reverse osmosis systems directly from California's authorized partner. Every purchase includes full manufacturer warranty, certified installation, and free delivery.
Find the perfect water filtration system for your home
Our most popular category. Tankless reverse osmosis systems that install under your kitchen sink. Multi-stage filtration, smart monitoring, and NSF certified.
The ultimate in water filtration. UV sterilization, smart faucet displays, up to 1600 GPD flow rate, and app-controlled monitoring. For those who want the best.
No plumbing required. Perfect for renters. Many models feature instant hot water dispensing for coffee, tea, and baby formula. Plug in and pour.
Keep your Waterdrop system running at peak performance. Replacement filters for every model, organized by system compatibility. We also offer scheduled replacement service.
The difference between buying from us vs. Amazon or a random retailer
Every system purchased from us comes with Waterdrop's full manufacturer warranty. Buy from unauthorized sellers and your warranty may be void.
We don't just ship you a box. Our certified technicians install, test, and calibrate your system. Plumbing, faucet, drain — all included.
Free delivery anywhere in our California service area. We handle everything from unboxing to the first glass of purified water.
We test your water before and after installation. You'll see the exact TDS reduction and know your system is performing at peak filtration.
We offer scheduled filter replacement. We come to your home, swap the filters, flush the system, and test — so your water quality never drops.
Questions about your system? Call us directly. No overseas call centers, no chatbots — real humans who installed your system and know it inside out.
Independent testing has found lead, chromium-6, PFAS, microplastics, chloramine, and dozens of other contaminants in California municipal water supplies. Many exceed health guidelines set by the EWG. Waterdrop reverse osmosis removes 99.9% of these contaminants — giving you water that's cleaner than bottled.
Waterdrop reverse osmosis systems use a multi-stage filtration process to remove contaminants from your tap water. Water passes through a sediment filter, a carbon block filter, and then through a semi-permeable RO membrane that blocks particles as small as 0.0001 microns. The result is water that's free of lead, chlorine, fluoride, PFAS, arsenic, mercury, microplastics, and hundreds of other harmful substances. Every Waterdrop RO system is NSF 42, 53, and 58 certified.
Choosing the right water filtration system depends on your household size, budget, and installation preferences. Homeowners looking for the highest quality should consider the X Series or the flagship G3P800. Budget-conscious buyers will love the G2 or T3-C undersink systems starting at $279. Renters should check out our countertop collection — no plumbing, no drilling, take it when you move.
Every undersink system we sell can be paired with professional installation by our certified technicians. We handle the water line connection, faucet installation, drain routing, and initial system flush. Most installations take 1-2 hours. Learn more about our installation services or view our pricing page.
Browse our Waterdrop collection below or book a consultation to find the perfect system for your home.
Shop our full Waterdrop catalog — add to cart and request installation in one step