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.
Drinking Water — common questions
What Magic Valley homeowners ask us most before they buy.
How does reverse osmosis work?
Water is pushed through a semipermeable membrane that blocks dissolved solids, nitrates, lead, and most contaminants while letting water molecules through. Pre-filters catch sediment and chlorine before the membrane, and a carbon post-filter polishes taste on the way to the faucet. Filtered water is held in a small tank under the sink so it's there when you need it.
How often do RO filters need changing?
Pre-filters and carbon post-filters are annual on most systems. The membrane itself lasts three to five years, longer if the water is softened first — hardness is the main thing that shortens membrane life, which is why we usually recommend the softener and RO together.
Does reverse osmosis remove nitrates from well water?
Yes, and that's a real consideration in agricultural parts of the Magic Valley where nitrate levels in private wells can exceed the 10 mg/L drinking water standard. RO is one of the few point-of-use technologies that reliably reduces nitrates. If you're on a well and haven't tested for it, we'll include it in your free water test.
Can RO be plumbed to the refrigerator ice maker?
Yes — that's one of the most requested add-ons. We run a dedicated line from the RO tank to the fridge so ice and chilled water come from the same filtered supply. It's a straightforward addition during install and can be retrofitted later.