Clean water is a top priority for homeowners and businesses alike. When your clients turn on their taps, they expect safe, great-tasting water. Unfortunately, standard municipal treatment doesn’t always catch everything. That is where you, the professional plumber, step in with reliable filtration solutions.
If you frequently get asked, “what is a ro water system?” by your customers, you need a simple, clear way to explain it. A reverse osmosis (RO) system is an advanced water purification setup. It forces water through a specialized semi-permeable membrane to strip away dissolved solids, chemicals, and impurities. The result is incredibly pure drinking water right at the point of use.
Considering an RO system is a smart move for your clients. These units offer massive health benefits by filtering out harmful contaminants. They drastically improve the taste and smell of tap water. Plus, they are highly cost-effective over time, eliminating the need for expensive and wasteful bottled water. As their trusted local supply partner, you can help them choose, install, and maintain the perfect system.
The Science Behind Reverse Osmosis
When a customer asks how the unit actually purifies the water, having a clear answer builds trust.
How does a RO water system work?
A standard RO system relies on household water pressure to push tap water through a series of filters. The star of the show is the reverse osmosis membrane. Regular filters act like a screen door, keeping out bugs but letting air through. The RO membrane is much tighter. It separates the water molecules from dissolved impurities, flushing the bad stuff down the drain and sending the clean water to a storage tank.
Detailed breakdown of filtration stages
Most systems feature several stages to protect the membrane and polish the water.
Sediment filter
Water first flows through a sediment pre-filter. This catches large particles like dirt, rust, and silt. Removing these larger solids is crucial because they can easily clog or damage the delicate components down the line.
Carbon filters (GAC, CTO)
Next, the water passes through one or more carbon filters. Granular Activated Carbon (GAC) filters are great for high flow rates and catching chlorine. Carbon Block (CTO) filters offer finer filtration to remove bad tastes, odors, and volatile organic compounds (VOCs). These pre-filters protect the RO membrane from chlorine damage.
RO membrane: The heart of the ro water system
The pre-filtered water is then forced through the semi-permeable RO membrane. This is where the heavy lifting happens. The membrane catches microscopic impurities, allowing only clean H2O to pass through to the storage tank.
Post-carbon filter
Before the water reaches the dedicated faucet, it leaves the storage tank and passes through a post-carbon polishing filter. This final stage removes any lingering odors or tastes the water might have picked up while sitting in the tank.
Optional: UV filter, remineralization filter
Some clients want extra features. A UV filter uses ultraviolet light to destroy bacteria and viruses. A remineralization filter adds healthy minerals like calcium and magnesium back into the purified water, boosting the pH and improving the taste.
Pore size and contaminant removal capabilities
The RO membrane is remarkably effective due to its tiny pore size, typically around 0.0001 microns. To put that in perspective, a human hair is roughly 70 microns thick. This microscopic filtration allows the system to trap heavy metals, salts, and other tiny dissolved solids that standard carbon filters miss completely.
Benefits of a RO water system
Your clients want to know exactly what they get for their investment.
Health advantages
The biggest selling point is safety. RO systems remove or drastically reduce dozens of harmful contaminants. This includes lead, arsenic, copper, chromium, fluoride, and even certain pharmaceutical residues. By filtering out these risks, RO systems provide safer, healthier drinking water for families and employees.
Improved taste and odor of water
Chlorine and sulfur can make municipal water taste awful. Because an RO system strips out the chemicals causing these issues, the resulting water tastes crisp, clean, and fresh. Coffee, tea, and cooked foods also taste noticeably better when prepared with RO water.
Environmental benefits
We all want to cut down on plastic waste. An RO system provides bottled-water quality straight from the sink. This eliminates the need to purchase single-use plastic water bottles, keeping thousands of plastics out of local landfills every year.
Cost savings compared to bottled water
While there is an upfront cost to purchase and install the unit, the long-term savings are huge. Buying bottled water adds up fast. An RO system produces pure water for just pennies a gallon, keeping more money in your client’s pocket.
Convenience of on-demand purified water
No more lugging heavy cases of water from the grocery store. No more waiting for pitcher filters to slowly drip. A reverse osmosis system provides a constant supply of purified water right at the kitchen sink.
Types of RO Water Systems
Different clients have different needs. Knowing which system to recommend will make your job easier and keep your customers happy.
Under-sink RO systems
These are the most common units you will install in residential settings. They sit neatly out of sight beneath the kitchen sink and connect to a dedicated drinking water faucet. They offer powerful filtration and plenty of water for a typical family. The installation is straightforward for a professional plumber, and maintenance is generally easy to access.
Countertop RO systems
Countertop units are freestanding and require minimal plumbing. They are a good choice for renters or small apartments where under-sink space is unavailable. However, they take up valuable counter space and usually hold less water than their under-sink counterparts.
Whole-house RO systems
When a client has severe water quality issues across the entire property, a whole-house RO system is the answer. These heavy-duty units treat water before it reaches the water heater, ensuring every tap in the house delivers pure water. They are much more expensive and require significant plumbing modifications, making your expertise absolutely essential.
Commercial RO systems
Restaurants, cafes, and car washes frequently require commercial-grade RO systems. These businesses rely on high volumes of pure water to protect expensive equipment like espresso machines from scale buildup, or to provide spot-free rinses. When you land these commercial contracts, you need a supplier that can deliver the right parts fast.
Installation and Maintenance of a RO water system
Your expertise is what sets you apart. While hardware stores sell DIY kits, professional installation ensures the system works perfectly and won’t leak.
DIY vs. professional installation
Many homeowners try to install under-sink systems themselves to save a few bucks. They often end up calling you when they drill the countertop hole incorrectly or botch the drain saddle installation. By offering professional installation, you guarantee the system meets local plumbing codes and operates efficiently.
Step-by-step guide to typical under-sink installation
- Mount the faucet: Drill a hole in the countertop or sink deck and secure the dedicated RO faucet.
- Install the feed water valve: Tap into the cold water supply line to feed the RO unit.
- Attach the drain saddle: Drill a small hole in the sink drain pipe and attach the saddle valve to handle the wastewater.
- Position the tank and filter assembly: Place the storage tank and the filter manifold under the sink.
- Connect the tubing: Run the color-coded tubing between the feed valve, filters, tank, drain, and faucet.
- Pressurize and flush: Turn on the water, check for leaks, and flush the system a few times to clear out carbon dust.
Filter replacement schedule and process
Regular maintenance is a great way to build recurring revenue.
- Pre-filters and Post-filters: Replace every 6 to 12 months.
- RO Membrane: Replace every 2 to 3 years, depending on water hardness.
Keep a schedule of your installs and reach out to your clients when it is time for a filter change. You can always order the exact replacement filters you need through PlumbersOnly.com.
Troubleshooting common issues
Even the best systems occasionally run into hiccups.
- Low pressure: This usually means the pre-filters are clogged or the storage tank has lost its air charge. You might need to repressurize the tank with a bicycle pump.
- Leaks: Check your push-to-connect fittings. Make sure the tubing is cut perfectly straight and seated fully into the collet.
- Bad taste: If the water tastes bad or cloudy, it is usually time to replace the post-carbon polishing filter.
Water waste considerations and modern RO advancements
Traditional RO systems send a fair amount of wastewater down the drain for every gallon of pure water they produce. Modern advancements have improved this dramatically. You can now install permeate pumps to increase the efficiency ratio. Additionally, tankless RO systems are gaining popularity. They use an internal pump to push water through the membrane on demand, reducing waste and saving space, though they do require an electrical outlet.
Choosing the Right RO System
Helping your client pick the right hardware ensures a successful project.
Factors to consider
Look at the incoming water quality, the household size, and the client’s budget. A large family will need a system with a higher gallons-per-day (GPD) rating and a larger storage tank to keep up with demand.
Certifications and standards
Always look for products tested and certified by the National Sanitation Foundation (NSF) or the Water Quality Association (WQA). NSF/ANSI 58 is the standard specifically designed for reverse osmosis systems, verifying that the unit actually reduces the contaminants it claims to.
Understanding TDS
Total Dissolved Solids (TDS) refers to the combined content of all inorganic and organic substances contained in a liquid. A simple TDS meter helps you test the feed water and the RO water to verify the membrane is doing its job.
Comparing different brands and models
You want to install brands you can trust. Partnering with Van Marcke Plumbing Supply gives you access to top-tier, reliable brands. Our extensive inventory ensures you get the quality products your clients demand, right when you need them.
Common Misconceptions about a ro water system
Clients read a lot of confusing information online. You can be the expert who clears things up.
“RO water is too acidic.”
Because RO removes alkaline minerals, the water’s pH does drop slightly, making it mildly acidic. However, it is not harmful to drink. The human body naturally regulates its own pH levels.
“RO water removes beneficial minerals.”
It is true that reverse osmosis removes minerals like calcium and magnesium. However, we get the vast majority of our necessary minerals from the food we eat, not the water we drink. If a client is highly concerned about this, you can simply install an inline remineralization filter to add those minerals back in.
“RO systems waste too much water.”
Older systems were definitely inefficient. But as we discussed earlier, modern systems use smart hydraulics and permeate pumps to drastically reduce waste, making them a much more eco-friendly choice today.
Wrapping Up Your RO Knowledge
Understanding what is a ro water system allows you to provide exceptional service to your customers. By offering reliable filtration solutions, you solve their water quality issues, protect their health, and build long-term trust.
When you book those installation jobs, you need a supplier that has your back. Van Marcke Plumbing Supply offers an extensive product range of over 6,000 brand-name products across Arizona, Nevada, and Texas. With PlumbersOnly.com, you can shop anytime, anywhere, skipping the lines and getting your supplies fast. Plus, our loyalty rewards program means you earn points for every purchase.
Simply efficient buying means you spend less time sourcing parts and more time growing your plumbing business. Check out our latest RO systems and replacement filters online today, and let us be your