Water filter for sink: clean drinking water right from your kitchen faucet
Better water for drinking and cooking. No more jugs.
Cleaner water for drinking and cooking, right from your kitchen faucet. Compare our under-sink filters and reverse osmosis systems below.
- Under-sink
- Licensed install
- 30-day money-back guarantee
Want the answer for your home?
Tell us your ZIP code and a rep calls you within 5 minutes to answer every question. No pressure, no sales visit.
You're probably on this page because:
- You're still buying bottled water
- Your pitcher filter can't keep up
- Your tap water tastes off
Clean water, right from your faucet.
Drinking water, by the numbers
- 4 parts per trillion: the EPA's 2024 limit for PFOA and PFOS.
- 59% of people are concerned about their water quality.
Sources: EPA; WQA 2025 via WCP.
Under-sink filter or reverse osmosis?
| Under-sink filter | Reverse osmosis | |
|---|---|---|
| Chlorine, taste | ✓ | ✓ |
| Lead, fluoride, dissolved solids | [confirm] | ✓ (certified) |
| Best for | Better taste | The cleanest water |
Fix the sink, or fix the whole house?
RO fixes your drinking water. A whole-house system fixes every shower, faucet and appliance too.
Our City Water System includes this RO plus a whole-house softener and carbon filter: $2,950 installed.
Savings in year one, and every year after
$414
- 10-year total
- $4,136
- Pays for the City Water System
- 1.4 times over 10 years
- Water heater energy
- $130
- Detergent and cleaning
- $144
- Appliances and fixtures
- $140
- Bottled water (with RO)
- $0
An estimate, not a guarantee. Your numbers depend on your water, your home and your habits. Enter your ZIP code to use your local hardness; until then it assumes 10 grains.
Sources: Water heater efficiency: WQRF and Battelle (gas tank heaters lost up to 48% efficiency on hard water; the calculator uses a conservative middle value). Detergent: WQRF laundry and dishwasher studies (about 30% less at 10 gpg, nearly 70% less at 25 gpg). Fixtures: Battelle (low-flow shower heads clogged in about 18 months on hard water). Appliance figures are our own conservative estimate until customer data replaces them.
Every install comes with
- Licensed local plumber install
- Before-and-after water test
- 30-day money-back guarantee on the system
- Warranty: [product terms] + 1 year on labor
- Filter subscription option: new filters every 6 months
Part of the City Water System
$2,950 installed, with everything it takes to put it in.
Schedule a Call
Life with it vs. without
| Without it | With it |
|---|---|
| Bottled water runs | Clean water at the sink |
| Pitchers that never keep up | Filtered water on tap |
How we work, start to finish
- 1
You reach out or book online
- 2
A rep calls you, usually within 5 minutes, to confirm your system and answer questions
- 3
We schedule a licensed local plumber, usually within a week
- 4
Install day: a few hours, plus a before-and-after water test
- 5
After that: new filters every 6 months if you subscribe
Our take
The sink filter mistake we see all the time
After [thousands] of filtration systems sold, these are the questions customers ask us most:
Most people start with a pitcher or a filter that clips onto the faucet. They're cheap, and they do help with chlorine taste. But they're small, they filter slowly, and the cartridges run out fast. Many people keep using them long after they've stopped working, because nothing tells you when a filter is done.
Here's how the options really stack up:
Pitcher or faucet-mount: better taste, small amounts, frequent cartridge changes. Under-sink carbon filter: better taste and more capacity, out of sight, changes about twice a year. Under-sink reverse osmosis: the deepest clean. Certified systems reduce lead, fluoride, PFAS and most dissolved solids.
Before you buy any sink filter, check four things. One: is it certified by NSF, WQA or IAPMO, and for what? NSF/ANSI 42 covers taste and chlorine, 53 covers health contaminants like lead, and 58 covers reverse osmosis. Two: how many gallons a day it makes. Three: what the filters cost per year, not just the unit. Four: whether it needs its own faucet. A filter with no certification for a contaminant hasn't proven it removes it, no matter what the box says.
That's how we pick what we install: certified for what we say it removes, sized for real kitchens, and filters that show up on their own every 6 months.
Built with our own manufacturers
20+ years supplying water systems.
- 20+ years in water
- Our own patents
- We supply other water companies
- [Thousands] of systems sold
- Licensed installers
Related Pages
Questions people ask
What's the best water filter for a kitchen sink?
For the cleanest water, reverse osmosis. For better taste on water that's already decent, an under-sink carbon filter.
Do I need a separate faucet?
Most under-sink RO systems use their own small faucet next to your main one. [Confirm per model.]
Will it fit under my sink?
Most do. We confirm the space before you book.
How often do sink filters need changing?
Usually every 6 to 12 months. Subscribe and they arrive automatically.
Can a sink filter replace bottled water?
Yes. Most RO customers stop buying bottled water within the first week.
Can I install it myself?
You can, but our price includes a licensed install and our guarantee depends on it.