Reverse Osmosis Drinking Water
Bottled-quality water from your own tap.
A reverse osmosis (RO) system installs under your kitchen sink and delivers crisp, clean drinking water on demand. It removes dissolved solids, chlorine taste, lead, nitrates, and most contaminants a softener can't touch — so your coffee, ice, and drinking glass all taste better, for pennies per gallon.
What to know before you buy
- How RO works
- Water is pushed under household pressure through a semi-permeable membrane with pores so small that only water molecules pass through. Dissolved minerals, salts, and contaminants are flushed to the drain. The clean water collects in a small storage tank under your sink, ready when you turn on the faucet.
- What it removes
- Sediment, chlorine, chloramines, lead, arsenic, nitrates, fluoride, and most dissolved solids. If you can taste your water — or if you're buying bottled because you don't trust the tap — RO is the fix.
- Pairs with a softener
- Soft water extends RO membrane life dramatically. If you're on hard water, install a softener first and your RO will run cleaner and last longer.
What to compare
- Number of filter stages (3, 4, 5, or 6)
- Membrane quality and gallons-per-day rating
- Storage tank size (typically 3–4 gallons)
- Filter replacement cost and interval
- Faucet style — basic chrome to designer matte black
- Optional: refrigerator/ice-maker hookup, remineralization
Reverse Osmosis Drinking Water we sell
Hague H3500 Reverse Osmosis
Premium 4-stage RO with the longest membrane life we sell.
A high-output under-sink reverse osmosis system from the same engineers that build the WaterMax. Delivers bottled-quality water to a dedicated faucet at your kitchen sink — and to your fridge ice-maker if you want it.
- 4-stage filtration with high-rejection membrane
- High daily output — no waiting for the tank to refill
- Optional fridge / ice-maker hookup
InterFlo QuadPro SST
Tankless, high-efficiency RO with 4-year membrane life.
A sleek tankless reverse osmosis system that delivers purified water on demand — no storage tank taking up the cabinet, no waiting for a refill, and dramatically less wastewater than a traditional RO. Patented Superior SmartFlow dual-channel membrane resists scale from hard water and lasts up to four years between changes.
- Tankless design — frees up under-sink space
- 3 glasses of purified water for every 1 glass to drain (high efficiency)
- Patented dual-channel RO membrane, up to 4-year life
Nelsen Aqua Classic Reverse Osmosis
Proven under-sink RO with a pressurized storage tank.
The Aqua Classic is a traditional under-sink RO from Nelsen — blue filter housings, a pressurized 3.2-gallon steel storage tank, and up to 99% rejection of contaminants like chlorine, VOCs, fluoride, lead, arsenic, nitrates, and heavy metals. Optional booster or permeate pump for homes with low water pressure, and an ECF extended-contact carbon module for extra taste and odor polishing.
- Removes up to 99% of taste, odor, VOCs, fluoride, arsenic, lead, and nitrates
- Pressurized 3.2-gallon storage tank — glass ready when you are
- Automatic shut-off valve eliminates wastewater when the tank is full
InterFlo IF-14 Drinking Water Filter
Single-cartridge under-sink filter for great-tasting cold water.
A simple, high-performance carbon block filter that installs under the sink and feeds a dedicated cold-water faucet. Not an RO — no membrane, no drain line, no storage tank. Just clean, better-tasting water from a single cartridge you change once a year.
- Reduces chlorine, cysts, giardia, live cryptosporidium, lead, and particulates
- Single-cartridge design — no tank, no drain line
- 12-month cartridge replacement interval
Not sure which one is right?
Tell us about your home — we’ll recommend the best fit. Free, no-pressure in-home estimates.