Reverse Osmosis System

Under-sink 4- and 5-stage RO for pure drinking and cooking water at the kitchen tap.

Typical timeline: 1 day

A reverse osmosis (RO) system removes 95–99% of dissolved solids, including fluoride, lead, nitrates, and pharmaceuticals — things whole-home carbon can't touch. It lives under your kitchen sink with a dedicated faucet on the counter. We install 4-stage and 5-stage systems (APEC, iSpring, or Culligan) with sediment, carbon, RO membrane, and post-carbon filters. Fridge and ice-maker lines tie in for pure ice and drinking water. Every install includes a leak-detection auto-shutoff and pressurized storage tank sized to your household.

Materials

What we install vs. what corner-cutters use.

System

What we install

4- or 5-stage with quality membrane (Filmtec/Dow).

Common shortcut

low-grade all-in-one with generic membrane.

Why it matters: Quality membranes last 3–5 years vs 1–2 for low-grade.

Faucet

What we install

Solid brass with quality ceramic disc.

Common shortcut

Plastic faucet.

Why it matters: Plastic faucets drip and crack in 1–2 years.

Safety

What we install

Auto-shutoff leak detector, air-gap drain.

Common shortcut

No leak detection.

Why it matters: Leak detection has saved dozens of our customers from flooded kitchens.

Process

A predictable path — with real durations.

Site check

30 min

Confirm cold water supply, drain, faucet location, fridge line if desired.

Install

2–3 hours

Mount system, connect supply/drain/faucet, tie fridge line.

Startup & test

1 hour

Flush membrane, TDS test, leak check.

Why us

Why homeowners pick Modern Builders for reverse osmosis system.

We install with a leak-detection auto-shutoff valve. If the system ever leaks, it shuts off water automatically — you don't come home to a flooded kitchen. Every install includes a proper drain saddle with air gap (code requirement) so contaminated wastewater can never siphon back into clean. We tie in your refrigerator ice-maker line at install so your ice and drinking water are both RO-pure.

FAQs

Answers before you ask.

How much water does RO waste?+

Modern RO wastes 1–3 gallons for every gallon produced. Older systems wasted 4–5. We install high-efficiency membranes standard.

Filter changes?+

Sediment and carbon: every 6–12 months. RO membrane: every 3–5 years.

Does RO remove healthy minerals?+

Yes — that's why 5-stage systems add a remineralization cartridge to restore calcium and magnesium.

Can I connect it to my fridge?+

Yes — included in every install if you want it.

Go deeper before you decide.

The Benefits of Reverse Osmosis System

Why homeowners invest in reverse osmosis system — and what you actually get back in comfort, value, and day-to-day livability.

Read the article →

Reverse Osmosis System: A Homeowner's Guide

Everything a Houston-area homeowner should know before starting a reverse osmosis system project — scope, materials, timeline, and the questions worth asking.

Read the article →

Get a quote — we do it right.

Fixed-price proposals, real timelines, no corners cut. Tell us about your reverse osmosis system project.

Request your quote