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For homeowners in Knoxville looking for clean, refreshing drinking water at every tap, Tennessee Standard Plumbing provides top-quality Reverse Osmosis (RO) systems. Our experienced team specializes in the installation, maintenance, and repair of point-of-use RO systems that deliver pure, great-tasting water directly from your kitchen sink.
With an RO system, you can enjoy water free from contaminants, unpleasant tastes, and odors—eliminating the need for bottled water.
Contact us today for a free quote and start enjoying fresher, cleaner water right from your tap.




Tap water may look clean, but it can still contain contaminants like chlorine, lead, bacteria, and heavy metals. Reverse Osmosis (RO) filtration is one of the most effective ways to purify water.
An RO system uses a semipermeable membrane to remove impurities, delivering water that is as clean and pure as possible from your kitchen sink. In addition to purifying the water, RO also improves taste and removes unpleasant odors, making it ideal for drinking, cooking, and even making ice.
Whether you’re concerned about local water quality or simply want filtered water readily available, a point-of-use RO system is a smart choice.

If you notice any of these signs, it might be time to install an RO system:




A reverse osmosis system addresses these issues, providing cleaner, better-tasting water directly from your faucet.


If something goes wrong with our workmanship, we make it right—no excuses, no runaround, even if it means covering the cost ourselves.

You’ll always receive multiple options and a clear price before any work begins. Once you approve, that price won’t change.

We respect your schedule. If we miss our arrival window, we waive the service fee.
By investing in an RO system, you ensure that your family has access to clean, safe water whenever you need it.



The plumber who came out to our home, William Gough, was personable, professional, and knowledgeable. He talked us through the repair every step of the way. We will definitely call Tennessee Standard Plumbing for any further needs.
We contacted Tennessee Standard to replace the drain pipes in our home. When they came out to perform the replacement they also checked our main sewer line, which was also in need of replacing. Patrick was able to immediately work up an estimate for the mainline repair and was able to fix…
We had multiple plumbing issues and Patrick Bordine was highly recommended. Not only did Patrick fix our issues, he shared his knowledge and provided multiple options. Since moving to TN and trying multiple plumbers, we have definitely found our “go to” plumber! Tennessee Standard and Patrick Bordine proved to be reliable and knowledgeable.
Had an overall great and professional experience from first call to get scheduled all the way to the end in getting our kitchen draining issue resolved. Will definitely use them again and would refer them to anyone.
A point-of-use reverse osmosis system is a compact filtration unit installed at a single faucet, usually under the kitchen sink. It uses pre-filters, a semi-permeable membrane, and a post-filter to deliver purified water to one tap.
Reverse osmosis forces water through a semi-permeable membrane under pressure so most dissolved salts, heavy metals, and small particles are left behind. Pre-filters protect the membrane from sediment and chlorine and post-filters polish taste.
Yes. A properly configured RO system reduces lead and removes chlorine when the unit includes the right pre- and post-filtration stages. Performance depends on the membrane and the full filter setup.
Many RO systems reduce fluoride but removal depends on membrane type and system design. If fluoride removal is important, choose a system or membrane rated for that purpose.
Pre-filters and carbon filters are usually replaced every 6 to 12 months, depending on water quality and use. The RO membrane typically lasts between 2 and 5 years.
Yes. RO water is safe when the system is installed and maintained correctly. Some people add a remineralization stage for taste and to restore small amounts of minerals.
Yes, many systems are installable by a competent DIYer, but professional installation ensures proper connections, pressure checks, leak testing, and code compliance.
Standard home RO systems produce wastewater while flushing contaminants. Typical ratios range from about 3 to 5 gallons of waste per gallon of product water, though high-efficiency units use less.
An RO system provides comparable purity at the tap and reduces plastic waste. Over time it is usually more economical than buying bottled water.
RO systems are not equally effective against every contaminant. Certain dissolved gases and some very small VOCs can pass through unless the system includes specific additional filtration stages.
With regular maintenance, a residential RO system can last 10 to 15 years. Replacing filters and membranes on schedule extends life and maintains performance.
Look for reduced flow, poor taste, strange odors, or an increase in TDS on a meter. These signs usually indicate filter changes or membrane service is needed.
Typical annual maintenance includes filter replacements and occasional membrane changes. Costs vary by system but are generally lower than ongoing bottled water expenses over time.