Reverse Osmosis System

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

Typical timeline: 1 day
Reverse Osmosis System
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.

1

Site check

30 min

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

2

Install

2–3 hours

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

3

Startup & test

1 hour

Flush membrane, TDS test, leak check.

Customer projects across Houston

Drag to reveal the reverse osmosis system transformation.

Recent reverse osmosis system projects from neighborhoods across the Houston area. Drag the slider on each image to see the before and after.

The Heights · Reverse Osmosis System — afterThe Heights · Reverse Osmosis System — before
Before
After
The Heights · Reverse Osmosis System
Project 1 of 10The Heights, Houston

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.

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