Reverse Osmosis System Installation

Under-Sink Reverse Osmosis System Installation

A reverse osmosis system provides filtered drinking water through a dedicated kitchen faucet or a compatible integrated fixture. Unlike a basic sediment filter, an RO system uses a membrane to reduce dissolved solids and, depending on its certified performance, specific contaminants.

Installing one requires more than connecting a filter to the cold-water line. The unit must fit beneath the sink, have suitable water pressure, connect to an approved drain arrangement and remain accessible for filter changes.

United HVAC, Plumbing & Electrical installs residential reverse osmosis systems throughout the Bay Area. We assess your existing kitchen plumbing, review the equipment requirements and make the connections needed for the selected installation.

What Does Reverse Osmosis Installation Include?

The exact installation depends on the RO system and your kitchen layout. We review the setup and determine which connections or plumbing adjustments are needed.

Typical work may include:

• Checking cabinet space and access to the cold-water supply

• Mounting the RO filtration assembly and storage tank, if applicable

• Installing a compatible dedicated drinking-water faucet

• Connecting the supply and wastewater lines

• Checking the existing shutoff valve and fittings

• Flushing the system according to manufacturer instructions

• Checking the connections for leaks and verifying operation

If you are also replacing your kitchen fixture, our kitchen sink installation and faucet installation services may be relevant.

Choosing the Right RO System for Your Kitchen

Tank-Based and Tankless Systems

A traditional RO system stores filtered water in a pressure tank. A tankless design filters water on demand and may require an electrical outlet. Both options have different space, water pressure and flow requirements.

Faucet and Refrigerator Connections

Many RO systems use a separate faucet for drinking water. Some can also connect to a compatible refrigerator or ice maker, but this depends on the equipment and available water pressure. We review the installation requirements before making additional connections.

Water Efficiency and Filter Performance

RO systems discharge a portion of incoming water during filtration. The amount varies by model and operating conditions. When comparing systems, check the manufacturer’s efficiency and recovery information.

For drinking-water treatment, look for products certified to NSF/ANSI 58 and review the specific contaminant-reduction claims. Certification does not mean every RO system reduces every contaminant.

Replacing an Existing Reverse Osmosis System

If your current RO unit has persistent leaks, low output or damaged connections, the problem may involve a filter, membrane, storage tank, valve or fitting.

Before replacing the entire system, it’s worth checking whether the existing equipment can be serviced and whether replacement components remain available.

When a new system is the better option, we assess whether it can use the existing faucet opening, water supply and drain arrangement or whether those connections need to change.

Reverse Osmosis Installation Cost

The cost of professional RO system installation depends on the equipment and plumbing configuration.

Factors include the type of RO system, available cabinet space, faucet installation requirements, condition of the existing shutoff valve, and whether additional water or drain connections are needed.

A straightforward replacement of a compatible existing unit may involve less work than installing a new system in a kitchen without dedicated filtration connections.

Contact United HVAC, Plumbing & Electrical at (408) 539-6936 to discuss your equipment and request an installation estimate.

Reverse Osmosis Installation Across the Bay Area

United HVAC, Plumbing & Electrical serves homeowners in San Jose, Santa Clara, Sunnyvale, Cupertino, Mountain View, Campbell, Palo Alto and surrounding communities.

Planning an under-sink RO installation or replacing an existing drinking-water filtration system? Tell us which model you have and whether the kitchen already has a dedicated filtered-water faucet.

Call (408) 539-6936 to schedule a plumbing consultation.