Drinking water at the point of use
Reverse osmosis, often shortened to RO, uses a membrane with supporting filter stages. An under-sink installation supplies a dedicated faucet, and some installations can also connect to a refrigerator when the equipment and plumbing support it.
This is a different scope from whole-house filtration. It focuses on water for drinking and cooking rather than treating every shower, appliance, and tap. That narrower scope can suit a household whose main concern is kitchen water.
Choose the model for the reduction claim
Different systems have different performance certifications. Check the exact model and its documented reduction claims for the substances you are concerned about. A total dissolved solids reading on its own does not identify contaminants or establish that water is safe.
If you have a property-specific concern, obtain an appropriate test and discuss the result before choosing equipment. Avoid assuming that every reverse osmosis system has the same capacity, efficiency, or reduction performance.
Space, water pressure, and installation
The installation plan should allow for filters, any storage tank, the faucet, drain connection, and access for replacement work. Tankless models can have different power and flow requirements. Ask how the selected system will work with your existing sink and cabinet.
A good estimate should state the equipment model, included faucet, any countertop work, plumbing connections, and startup procedure. Ask whether the quoted scope includes a refrigerator line if you want one.
Water efficiency and filter replacement
Reverse osmosis produces treated water and a reject stream. Compare the model’s efficiency and ask about WaterSense-labeled options. The United States Environmental Protection Agency provides information on point-of-use reverse osmosis and water efficiency.
Cartridges and membranes have different service intervals. Ask for a maintenance schedule, replacement part costs, sanitizing instructions, and any ongoing service options before selecting a system.
What belongs in your estimate?
- The exact equipment model and documented performance
- Installation scope, plumbing changes, and any applicable permits
- Installer details, licensing where required, and warranty terms
- Replacement parts, service intervals, and ongoing costs
Call (424) 353-2879 to discuss your property. Your consultation can help identify what needs to be checked before a final recommendation.
Common questions
Does reverse osmosis treat my whole home?
A typical under-sink system treats a dedicated kitchen tap. Whole-home treatment requires a separately designed system.
Does a reverse osmosis system waste water?
It produces a reject stream as part of treatment. Compare model-specific efficiency and ask about WaterSense-labeled options.
Can I connect it to my refrigerator?
Sometimes. Confirm the refrigerator’s requirements, water pressure, routing, and whether the connection is included in the installation scope.
Further reading: LADWP water quality FAQs and EPA reverse osmosis guidance.