TABLE OF CONTENTS
WHAT DO YOU NEED YOUR REVERSE OSMOSIS SYSTEM FOR HOME TO DO?
"FASTEST POURS AT THE SINK"
→ UNDER SINK REVERSE OSMOSIS (TANKED)
Bigger footprint, no continuous power required, quickest first‑glass flow.
"CLEAN LOOK, SMALLER FOOTPRINT"
→ TANKLESS REVERSE OSMOSIS SYSTEM (our team favorite)
Requires continuous power. Looks sleek, compact. We add a small mini‑tank so your first 2 glasses fill faster than the fridge.
"I RENT / CAN'T DRILL"
→ COUNTERTOP REVERSE OSMOSIS WATER FILTER SYSTEM
Portable and plug‑in. Good temporary option.
"I WANT THE ENTIRE HOUSE ON RO"
→ READ OUR TAKE FIRST
Whole‑house RO is rarely needed in Middle TN homes; see why below.
POWER CHECK (60 SECONDS)
Look under the sink for an outlet. Plug in a phone charger.
- If your phone charges all the time: You have continuous power (OK for tankless).
- If it only charges when the garbage disposal switch is ON: That outlet is switched (not continuous). We can still do tankless—our electrician offers Will's Friends clients private rates; plan about one week of notice.
WHAT NASHVILLE AREA WATER REALLY MEANS FOR FAMILIES
- • Chlorine by-products (TTHMs & HAA5) are present at levels up to 90–100× higher than health guidelines (per EWG).
- • Nashville has confirmed 2,800 lead service lines, with 76,000 more still under review.
- • Hard water from our limestone geology leaves scale on dishes and appliances.
Legally safe ≠ optimal. That's why families add RO at the tap.
BOOK YOUR 15-MIN WATER DISCOVERY CALL
We'll have a quick 15 minute call to go over any questions you have and see if we are a fit. Serving Nashville • Franklin • Brentwood • Williamson & Davidson Counties.
UNDER‑SINK RO (TANKED) — BEST UNDER SINK REVERSE OSMOSIS FOR SPEED
What It Is
A classic under sink reverse osmosis system with a reverse osmosis storage tank (usually 2–4 gallons). It feeds a dedicated RO faucet and can tee to your fridge/ice maker.
Why Homeowners Love It
- • Prefilters/post‑filter: swap on the maker's schedule (we set reminders).
- • RO membrane: multi‑year when protected and maintained.
TANKLESS RO — COMPACT, LOOKS GREAT, OUR PERSONAL FAVORITE
What It Is
A sleek, tankless reverse osmosis unit that makes water continuously. It's compact and modern—great if cabinet space is tight and you want a clean look.
What to Know
EXAMPLE SPECS (TYPICAL OF MODERN TANKLESS SYSTEMS)
These numbers come from a current 600‑GPD tankless brochure and are representative of what we install; exact specs vary by model.
COUNTERTOP RO — FOR RENTERS & NO‑DRILL SETUPS
When It Makes Sense
You rent, live in a condo, or just want a countertop reverse osmosis unit without drilling.
- • Many popular countertop reverse osmosis filter designs are not certified to NSF/ANSI 58. Always check for independent certification and real performance data.
- • Some countertop models recirculate water internally (no external waste line), which can shorten filter life. Read the manual carefully and budget for more frequent filter changes.
WHOLE‑HOUSE RO — WHEN IT'S JUSTIFIED (RARELY)
OUR RECOMMENDATION
READY TO CHOOSE YOUR SYSTEM?
Nashville • Franklin • Brentwood • Williamson & Davidson Counties
KEY SPECS THAT MATTER (BUY ON THESE, NOT HYPE)
CERTIFICATIONS
Our tankless system is tested and certified by Intertek to NSF/ANSI/CAN-372 levels. Our tanked system is NSF/ANSI 58.
GPD (GALLONS PER DAY)
Membrane output rating. Real‑world flow changes with temperature & pressure; tanked systems deliver fast first pours, tankless produce continuously.
- Our tankless versions are at 600 GPD
- Our tanked version is at 100 GPD, but comes with a 4 gallon tank that increases the flow rate significantly
STAGES
Sediment → Carbon → RO Membrane → Carbon → Optional remineralization for taste/pH.
STORAGE TANK VS TANKLESS
Tanked:
- • No continuous power
- • Faster first‑glass flow
- • Larger footprint
Tankless:
- • Compact, modern
- • Needs power
- • Add mini‑tank for faster first pours
ADDITIONAL CONSIDERATIONS
BOOSTER / PERMEATE PUMP: We add these when they'll improve output/efficiency given your pressure and layout.
REVERSE OSMOSIS WITH REMINERALIZATION: Calcite (or calcite+magnesium) cartridge for a "spring‑like" finish.
REVERSE OSMOSIS VS WATER SOFTENER: RO = drinking water quality (reduces dissolved salts/metals/chemicals). Softener = whole‑home scale control. They solve different problems and work best together.
WHAT WE RECOMMEND
FREQUENTLY ASKED QUESTIONS
Real questions from Nashville homeowners about choosing the right RO system.
READY FOR BETTER WATER?
Book a 15-minute discovery call to discuss your water quality concerns and explore solutions—or call (615) 212-8488 for the fastest install.