Whole-Home & Under-Sink Reverse Osmosis Systems in Southern NH
Whole-home reverse osmosis and under-sink drinking-water systems, installed by licensed NH plumbers. We match the right RO system to your water and your needs.
Exceptionally Clean Drinking Water
Reverse osmosis can reduce up to 99 percent of total dissolved solids, depending on the system and water conditions. Reduction of individual contaminants such as lead, nitrates, arsenic, or fluoride depends on the selected system and its specific performance claims. A.J. LeBlanc Heating installs under-sink RO systems that provide plentiful filtered water directly at your kitchen tap. We recommend a current water test so we can match the right system to what is actually in your water.
A Trusted Choice in Southern NH, Family-Owned Since 1928
System-Specific Contaminant Reduction
Reverse osmosis helps reduce lead, nitrates, arsenic, fluoride, chromium, and many other dissolved contaminants.
Licensed NH Plumbers
RO system installations handled by licensed NH plumbers, with proper connection to your supply line and drain.
Refrigerator Line Connection
We can connect your RO system to your refrigerator ice maker and water dispenser for filtered ice and water throughout your kitchen.
Annual Filter Service
RO filters and membranes need replacement at different intervals. We offer annual service and review the replacement schedule for your equipment.
Whole-Home & Under-Sink RO Installation
A.J. LeBlanc Heating installs whole-home reverse osmosis systems as well as under-sink drinking-water systems. We recommend a current water test so we can match the right system to what is actually in your water. For other treatment options, explore our water filtration systems.
Under-Sink Reverse Osmosis Systems
A standard under-sink RO system fits neatly under your kitchen sink with a small storage tank and a dedicated filtered water faucet.
- 3 to 5 stage filtration and RO membrane
- Dedicated filtered water faucet at the sink
- Compact tank stores 2 to 4 gallons of filtered water
- Helps reduce lead, nitrates, arsenic, fluoride, and more
- Most installations completed in two to three hours
Refrigerator Line and Additional Connections
We can extend your RO system to supply your refrigerator water dispenser and ice maker with RO-filtered water.
- Refrigerator ice maker and water dispenser connection
- Dedicated line to a second sink if desired
- Compatible with most refrigerator models
- Clean-tasting ice and chilled water from your fridge
- Neat, hidden line routing through cabinetry
When Whole-Home Reverse Osmosis Makes Sense
Whole-home RO treats the supply entering the house, while under-sink RO serves the connected drinking-water outlets. A whole-home system needs a design based on water-test results and household demand.
Planning includes incoming flow and pressure, pretreatment, space for the equipment and any storage, reject-water drainage, and ongoing filter and membrane care. We discuss these requirements and whether whole-home or more targeted treatment fits your needs.
Free RO System Installation Estimate
Call or fill out the form. We will assess your needs and provide a written estimate.
Frequently Asked Questions
What does reverse osmosis remove from water?
Reverse osmosis reduces dissolved solids and can address specific contaminants such as lead, nitrates, arsenic, and fluoride. Actual reductions depend on the selected system and the claims verified for that model. Your water-test results help identify which performance claims matter for your home.
How is RO different from a carbon filter?
Carbon filtration is commonly used for chlorine taste and odor; other reductions depend on the media and model. RO adds a membrane that can reduce dissolved salts and other specific contaminants. We compare the actual system performance with your water-test results instead of treating either technology as a solution for everything.
How much water does an RO system waste?
An RO system produces treated water and a separate reject-water stream. The ratio depends on the model, incoming water, pressure, and operating conditions. We discuss the selected system efficiency and drainage needs with you rather than apply one ratio to every under-sink or whole-home installation.
How often do RO filters need to be replaced?
Pre-filters and post-filters typically need replacement every 6 to 12 months. The RO membrane usually lasts 2 to 3 years. We offer annual service so your system is always performing at its best.
Get in Touch
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Contact Information
Mon-Fri: 8am-4:30pm
Evenings & Weekends: Emergency Service
24/7 Emergency Service
No heat? No hot water? Call 603-623-0412 any time.