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Buying Guide
Whole-House Filter vs Under-Sink: Which One Actually Protects Your Family?
An under-sink filter is like locking the front door but leaving every window open. You drink filtered water from one tap — and shower in chlorinated water everywhere else.
By SafeMains Water Team18 February 20265 min read
If you've been comparing under-sink RO kits to a whole-home system, this is the post that ends the debate.
Your skin drinks more water than your mouth
The average 8-minute shower exposes you to more chlorine than drinking 8 glasses of tap water. An under-sink filter does nothing about that.
Quick comparison
| Feature | Under-sink | SafeMains whole-home |
|---|---|---|
| Filters drinking water | One tap only | Every tap |
| Removes chlorine from showers | No | Yes |
| Protects appliances from scale | No | Yes — extends life ~2x |
| Cartridge changes | Every 6 months | Every 12 months |
| 10-year cost | ~$3,200 + bottled water | ~$4,800 all-in |
One install. One day. Whole house.
Book a free in-home assessment and we'll size the right SafeMains system for your home.
#Filtration#Buying Guide#Whole House