Skip to main content
Licensed & Insured
12 min read
Updated Oct 2025

BEST RO SYSTEMS, INSTALLATION & COST

NASHVILLE • FRANKLIN • BRENTWOOD

Honest options, pro install, and water you'll crave, right from your tap.

Free
Home Visit with exact options
90 Days
Money-back guarantee
2-3 hrs
Install time
Financing
Subject to credit approval
Product render of a Will's Friends reverse osmosis system

TABLE OF CONTENTS

BEST RO SYSTEMS WE INSTALL (GOOD / BETTER / BEST)

GOOD

UNDER‑SINK (TANKED)

"Best Reverse Osmosis System Under Sink"

What it is:

Classic reverse osmosis drinking water system with a reverse osmosis storage tank (≈2–4 gal) feeding a dedicated RO faucet; can tee to the fridge/ice maker.

Why it's great:

  • Fast first‑glass flow
  • No continuous power needed
  • Proven reliability

Typical stage stack:

Sediment → Activated Carbon → RO membrane → Carbon post‑filter → Optional remineralization

Who installs it:

Our licensed plumbers, to local plumbing code.

BETTER

TANKLESS (COMPACT)

Our Team Favorite

What it is:

Sleek tankless reverse osmosis system that produces water continuously. Requires continuous power under the sink.

Speed tip:

We add a mini‑tank so your first 1–2 glasses pour quickly, then it reverts to on‑demand production.

Representative specs:

  • ~600 GPD capacity
  • ~0.4 GPM delivery
  • 0.0001 μm membrane precision
  • Auto‑flush & 1.5:1 low drain ratio

BEST

TANKLESS + REMINERALIZATION + WHOLE HOME FILTRATION/SOFTENER

Whole-Home Filtration + Softening

(Point of Entry)

  • 10×54 whole-home water filtration/softening system installed where water enters the house.
  • Removes chlorine/chloramine, reduces hardness minerals, and cuts down on other contaminants for every tap.
  • Benefits: no more chlorine showers, less scale on toilets, tile, and glass.
  • Dermatologists recommend whole-home filtration + softening for healthier skin and hair.

Tankless RO with Remineralization

(Point of Use)

  • Compact tankless RO system under your sink, finished with alkaline post-filter for taste and balance.
  • Optional mini-tank or booster pump available for homes with low water pressure.
  • Installed by our licensed plumbers, to local plumbing code.

WHAT NASHVILLE AREA WATER REALLY MEANS FOR FAMILIES

Nashville water quality and reverse osmosis treatment

READY WHEN YOU ARE — BOOK A DEMO OR CALL US

Book a 15‑min water discovery call (best for asking questions, getting ideas and seeing if this is a fit for you and your family). Serving Nashville • Franklin • Brentwood • Williamson & Davidson Counties.

Call (615) 724-9879

INSTALLED COST & FINANCING — HOW MUCH DOES A REVERSE OSMOSIS SYSTEM COST?

Middle Tennessee

Product render of a Will's Friends reverse osmosis system

We keep pricing straightforward. Your exact reverse osmosis system cost depends on choices like tanked vs tankless, remineralization, mini‑tank, booster/permeate pump, and whether electrical is needed under the sink.

WHAT DRIVES THE COST

The system you pick: tanked or tankless, and whether you add remineralization, a mini-tank or a booster pump.
Your kitchen: stone countertops to drill, a fridge or ice maker line, and whether there's power under the sink. Every home is different, so we give you exact options at your Free Home Visit.

FILTER & MEMBRANE REPLACEMENT — REVERSE OSMOSIS MAINTENANCE

FILTER REPLACEMENT

Sediment & carbon: every 6–12 months (protect taste and the membrane). We set reminders and can handle it for you.

CDC recommends following the manufacturer's schedule and notes that people with weakened immunity shouldn't change filters themselves.

MEMBRANE REPLACEMENT

Reverse osmosis membrane replacement: Typically multi‑year when protected and maintained.

WaterSense includes a membrane‑life requirement (labeling ensures baseline longevity) and requires ≥75% TDS reduction in testing.

PROFESSIONAL INSTALLATION — "REVERSE OSMOSIS SYSTEM INSTALLATION NEAR ME"

Product render of a Will's Friends reverse osmosis system

WHAT'S INCLUDED

Placement under the sink
Air‑gap faucet (backflow protection)
Tidy drain connection
Fridge line on request
Clean silicone/escutcheon work

WHY WE DON'T PUSH WHOLE‑HOUSE RO (AND WHAT TO DO INSTEAD)

OUR RECOMMENDATION

For Middle TN families, you'll get nearly all the benefits by pairing a softener/whole‑home carbon with a reverse osmosis system for home at the kitchen. It's simpler, far less expensive, and easier to maintain.

Whole-House RO

The biggest investment

Complex maintenance

Factory-grade equipment

Softener + Under-Sink RO

A fraction of the cost

Simple maintenance

Nearly the same benefits for far less

BOOK YOUR FREE WATER UPGRADE PLAN

We'll have a quick 15 minute call to go over any questions you have and see if we are a fit. Nashville • Franklin • Brentwood • Williamson & Davidson Counties.

Call (615) 724-9879

KEY SPECS THAT MATTER

GPD (GALLONS PER DAY)

Rate at standardized conditions; tanked = fast first pours from storage, tankless = continuous production.

TDS REDUCTION & CERTS

Look for NSF/ANSI 58 (baseline ≥75% TDS reduction); WaterSense® adds efficiency and membrane‑life and requires the waste‑to‑treated ratio on the label.

STAGES

Sediment → Carbon → RO membrane → Carbon → optional remineralization (taste/pH).

WASTE RATIO

Older units ran 3–4:1; modern designs (like our 600‑GPD tankless) list ~1.5:1. WaterSense‑labeled models must be ≤2.3:1.

ADDITIONAL CONSIDERATIONS

BOOSTER / PERMEATE PUMP: We add these when pressure or layout calls for it.

5‑STAGE REVERSE OSMOSIS SYSTEMS: Stage count matters less than certified performance and maintenance.

FREQUENTLY ASKED QUESTIONS

Real questions from Nashville homeowners about RO installation and cost.

READY FOR BETTER WATER?

Book a 15-minute discovery call to discuss your water quality concerns and explore solutions—or call (615) 724-9879 for the fastest install.