Under-Sink Drinking Water

5-Stage Reverse Osmosis System

Clean, great-tasting drinking water right at your sink. Five stages of filtration remove up to 99% of contaminants — including lead, fluoride, PFAS, and chlorine.

5-Stage Reverse Osmosis System
5-Stage Filtration · Storage Tank · Dedicated Faucet
Lifetime Warranty

Pure Drinking Water At Your Sink

The most affordable way to get genuinely clean drinking water. Installs under your existing sink and delivers purified water through a dedicated faucet.

🔧

Under-Sink Design

Installs neatly under your kitchen sink. Out of sight, always accessible.

🛡️

99% Contaminant Removal

Removes lead, chlorine, fluoride, nitrates, arsenic, PFAS, and hundreds more.

🚿

Dedicated RO Faucet

A separate faucet at your sink gives you pure drinking water on tap, any time.

♻️

Easy Filter Replacement

Filters swap out in minutes. No tools, no mess, no service call required.

The 5 Filtration Stages

Each stage targets different contaminants so nothing slips through.

1
Stage 1

Sediment Filter

Catches sand, silt, rust, and particles down to 5 microns

2
Stage 2

GAC Carbon

Removes chlorine, taste, and odor from your water supply

3
Stage 3

Carbon Block

Further reduces chloramines, VOCs, and chemical contaminants

4
Stage 4

RO Membrane

Removes up to 99% of dissolved solids, heavy metals, and PFAS

5
Stage 5

Post Carbon

Final polishing stage — removes any remaining taste or odor

Contaminants Removed

Lead
Arsenic
Fluoride
Nitrates
Chlorine
Chloramines
PFOA & PFOS
Mercury
Barium
Radium
Pharmaceuticals
Bacteria

System Specifications

Filtration Stages 5 stages
Storage Tank 3.2 gallon pressurized
Flow Rate Standard household
Contaminant Removal Up to 99%
Installation Under-sink
Faucet Dedicated RO faucet included
Warranty lifetime warranty

What's Included

  • 5-stage filtration system
  • 3.2 gallon pressurized storage tank
  • Dedicated RO faucet (brushed nickel)
  • All connection hardware & tubing
  • Professional installation
  • lifetime warranty
  • Lifetime phone support

Filter Schedule: Stages 1–3: every 6–12 months. RO membrane: 2–3 years. Post carbon: annually.

5-Stage RO System — Common Questions

Is a 5-stage RO enough to handle Raleigh's water quality issues?

Yes. The EWG found 11 contaminants above health guidelines in Raleigh's water supply — including PFOS, trihalomethanes, haloacetic acids, and Chromium-6. A 5-stage reverse osmosis system removes over 99% of PFAS, over 99% of lead, 90–95% of nitrates, and virtually all dissolved solids that pass through the RO membrane, including most disinfection byproducts. For Raleigh homeowners who want clean, safe drinking water from the tap, the 5-stage RO is a proven, affordable solution. The only area where it differs from the 7-stage is alkaline remineralization and UV sterilization — important for some households but not essential for city water.

Does reverse osmosis remove fluoride?

Yes. The RO membrane removes approximately 90–96% of fluoride from drinking water. Raleigh adds fluoride to its water supply at around 0.7 mg/L, within the range recommended by the CDC for dental health. If you prefer to minimize fluoride exposure — for infants, specific health reasons, or personal preference — the RO system will effectively reduce it. Worth noting: the 5-stage RO removes most minerals from water, so the water will have a lower TDS (total dissolved solids) than tap water. If you want minerals added back, the 7-stage HW800 AlkaPro with its alkaline remineralization stage is worth considering.

Where does the storage tank go, and how big is it?

The 3.2-gallon pressurized storage tank stores purified water until you need it, then delivers it through the dedicated faucet on demand. The tank is roughly the size of a small basketball and sits upright under your kitchen sink. Most sink cabinets accommodate it with room to spare, even alongside the filtration unit and tubing. The tank holds enough water for most household drinking and cooking needs for a day — as you draw water, the RO membrane refills it continuously. If your cabinet space is tight, we can discuss alternative placement options before installation.

How long do the filters last and how much do replacements cost?

Stages 1–3 (sediment and carbon pre-filters) need changing every 6–12 months — typically once a year for a family of 4. The RO membrane lasts 2–3 years before needing replacement. The post-carbon polishing filter (stage 5) is replaced annually. Filter replacements are available through us or from standard suppliers. We include a maintenance schedule with every installation and provide lifetime phone support so you're never guessing about when to change filters. Annual maintenance is something most homeowners handle themselves in about 15 minutes — no tools required.

Can I use the RO water for my coffee maker, ice maker, or refrigerator?

Yes, and it makes a noticeable difference. Coffee and tea taste significantly better without chlorine, minerals, and contaminants. You can connect the RO system to a refrigerator ice maker or water dispenser with an additional line — we do this regularly during installations in Raleigh homes. The only exception is if your refrigerator uses a built-in filter on the line — in that case, you'd bypass it since the RO already handles filtration. The faucet we install at the sink is the primary draw point, but connecting to an ice maker is a common add-on.

Get Clean Drinking Water in Raleigh

Same-week installation, lifetime warranty — no obligation.

Want More? Upgrade Options

Call (984) 206-3774