Tank vs. tankless
Tank systems are proven and serviceable anywhere; tankless needs specific pressure and space. The site review settles it.
UNDER-SINK RO / CREST HILL
A dedicated tap for drinking water.
Under-sink reverse osmosis puts a separate, polished-water faucet at the kitchen sink — for drinking, cooking, coffee, and ice — without treating the whole home to RO standards.
See my priceTRANSPARENT STARTING POINTfrom $1,195
Typical standard installation. Final written pricing follows equipment, water-source, and site review.
Check my priceEvery price assumes a standard installation. Your exact price depends on your existing piping and where the equipment goes, but it is typically the price shown. Send us two photos (under the kitchen sink, and where the water line enters your home) and we confirm the exact price, install time, and date before any work.
WHERE IT FITS
A specific tool for a specific water goal.
Water treatment works best when the source, concern, flow, and maintenance plan are clear before equipment is selected.
- Drinking and cooking water is the primary concern
- Households under a lead-service or older-plumbing worry at the tap
- Smaller footprint than whole-home treatment
- Pairs with whole-home carbon or a softener upstream
What this system helps with
- LeadYes — certified to reduce lead (NSF/ANSI 53/58)
- Chlorine by-products (TTHM)Yes — certified to reduce TTHM (NSF/ANSI 53/58)
- Chlorine taste & smellYes — at the kitchen sink
- PFAS ("forever chemicals")Yes — certified to reduce PFOA/PFOS (NSF/ANSI 53/58)
What it doesn't do
- Hard water & scaleNo — not a softener
Filter claims apply to the exact certified model named on your quote, used and maintained the way the maker says.
THE DECISION POINTS
What determines the right configuration.
No stage count or tank size replaces a source review and an exact product performance sheet.
Certified to reduce lead
The RO systems we specify carry a certification listing that covers lead reduction; the listing accompanies your quote.
Membrane & stages
Stage count matters less than membrane quality and the certification listing. The quote states both.
Drain & air gap
RO needs a drain connection; local plumbing requirements for air gaps are followed during installation.
WHAT WE WILL NOT SKIP
Scope before promise.
- We do not claim RO makes unsafe water safe
- Filter-change schedule is stated before you buy
- A properly licensed plumbing contractor performs the connection