Reverse Osmosis Systems in San Diego
Under-sink reverse osmosis delivers bottled-quality drinking water straight from the tap. We install, service, and maintain RO systems with dedicated faucets and fast-fill tanks.
Reverse Osmosis Systems
- Under-sink RO installation
- Dedicated faucet install
- Fridge and ice maker feed
- Annual membrane and filter service
- Sizing for household demand
Need it handled today?
Give us a call. Same-day windows available.
Countywide hardness runs 15 to 20 grains per gallon on imported water from the Colorado River Aqueduct and State Water Project. Coastal blends around La Jolla and Pacific Beach vary a little; inland well water in Poway, Ramona, and Alpine adds iron and sulfur. We test first, then design.
Common questions
How is RO different from a filter?+
RO removes dissolved solids at the molecular level. Standard filters only catch particles and some tastes.
Does it waste water?+
Modern RO systems are far more efficient than older models. We install high-recovery units.
How often is service needed?+
Filters annually. Membrane every 2 to 5 years. Included in Gold and Platinum plans.
Where does San Diego's water come from and why is it hard?+
About 80% is imported from the Colorado River Aqueduct and State Water Project. Both are mineral-heavy sources, which is why countywide hardness runs 15 to 20 grains per gallon.
Is my well water different from city water?+
Yes. If you're in Poway, Ramona, Alpine, or parts of East County on well water, we run a full lab panel first. Wells often add iron, sulfur, or elevated TDS on top of hardness, and the system design is different.
The Lefty guarantee
Written guarantee
Every job backed in writing. If it fails, we come back.
Licensed & insured
Fully licensed technicians, insured, and background-checked.
4.9★ from 312+ reviews
Trusted by San Diego homeowners across the county.
Got a leak? Give Lefty a call.
Real diagnostics. Real prices. Real people who show up.