Under-Sink RO Installation
Four-stage RO plumbed to a dedicated faucet, typically installed in a morning across Union Township.
See Under-Sink RO Installation
Reverse Osmosis
Reverse Osmosis Drinking Water for Union Homes
Reverse osmosis is the most thorough drinking water treatment available to a homeowner. When you want to be certain about what is in the glass — for a baby’s formula, for a family member on a restricted diet, or just for peace of mind — RO at the kitchen sink is what we install.
- Free on-site water test
- Written quote before work
- Insured & permit-compliant
- We answer 24/7
Reverse osmosis for Union, NJ and Union Township
What Reverse Osmosis Services We Provide
Reverse osmosis is the most thorough drinking water treatment available to a homeowner, and it is the system we recommend when a test comes back with dissolved contaminants that filtration alone cannot touch. On this page we cover the full range: tank-based under-sink systems, tankless on-demand units that waste far less water, countertop plug-in units for renters who cannot modify plumbing, and RO paired with remineralisation for people who dislike the flat taste. A complete system is really four stages — sediment and carbon prefilters protecting the membrane, the membrane itself, and a carbon polishing filter on the way out — and the prefilters are what determine whether your membrane lasts two years or ten months. We install, we service, and we answer the phone 24 hours a day. The on-site water test is free.
Specifically, we install and service tank-based under-sink RO, tankless RO systems, countertop units, remineralising and pH-balancing stages, dedicated RO faucets, and scheduled prefilter and membrane changes. We work in Union Township only. To set scope honestly: RO is a point-of-use system for drinking and cooking water, not a whole-house solution — running an entire home through RO is slow, wasteful and something we will talk you out of. If you want every tap treated, you want carbon or a softener instead. Call (973) 380-3906 and we will tell you which.
Our Reverse Osmosis Services in Union, NJ
Each option below is quoted in writing after a free on-site test, and installed by technicians who service what they sell. Pick the closest match or call and describe your water.
Tank-Based RO Systems
Pressurised storage means water on demand. We size the tank to your household, quoted in writing beforehand.
See Tank-Based RO SystemsTankless On-Demand RO
Filters as you draw, with far less waste and no tank taking up cabinet space. Installed throughout Union.
See Tankless On-Demand ROPrefilter & Membrane Service
Prefilters every six to twelve months, membrane every two to three years. We track the schedule so you do not.
See Prefilter & Membrane ServiceRemineralisation & pH Balance
RO strips minerals along with contaminants. We add a remineralising stage when you want the taste back.
See Remineralisation & pH Balance24/7 Emergency RO Service
Leak under the sink, no flow at the RO faucet, or a failed tank? We answer nights and weekends countywide.
See 24/7 Emergency RO ServiceWater Pooling Under the Sink? We Answer 24 Hours a Day
An RO system has half a dozen push-fit connections, a drain saddle and a pressurised tank sitting inside your cabinet, and when one lets go it can soak a kitchen floor before anyone notices. That is a call to make immediately — we answer live 24 hours a day, 7 days a week, holidays included, and we will talk you through shutting the feed valve while we are on the way. A slow drop in flow at the RO faucet usually just means the prefilters are due, and we will schedule that normally.
How reverse osmosis works
RO pushes water against a semipermeable membrane with pores so fine that most dissolved substances simply cannot pass through. What gets rejected is flushed to the drain; what passes through is remarkably pure water. It is the same technology used to make bottled water and to desalinate seawater, scaled down to fit under your sink.
A complete system is really a chain. Sediment and carbon prefilters go first and exist to protect the membrane — particles would clog it and chlorine would chemically destroy it. Then the membrane does the real work. Finally a carbon polishing filter cleans up the taste on the way to your faucet. Skip or neglect any stage and the expensive part fails early.
What it removes — and what it does not
Being clear about the limits matters more than the marketing. Here is an honest split, so you know whether this is the system your house needs or whether you need something alongside it.
It handles
- Dissolved solids the other filters leave behind
- Nitrates
- Arsenic
- Lead and heavy metals
- Fluoride
- PFAS and many industrial contaminants
- Taste and odor, via the carbon stages
It will not handle
- Hardness throughout the house — RO treats one tap, not your plumbing
- Whole-house chlorine — you will still smell it in the shower
- Heavy sediment or iron without pre-treatment — these destroy membranes
Your options
Tank-based under-sink RO
Filters slowly and stores the result in a small pressurized tank under your sink, so a full glass is always ready. Needs room for the tank alongside the filter stack.
- Commonly specified
- Cloud RO was Quality Water Lab’s top pick after a 12-month test and is NSF 58 certified with built-in remineralization. The APEC ROES-50 is a long-standing value favorite. The iSpring RCC7AK adds mineralization and pH balance.
- Best for
- Most Union homes — reliable, no electricity required, easy to service.
Tankless RO
An electric pump filters on demand instead of storing water, so there is no tank taking up cabinet space and considerably less water sent to the drain. Requires an outlet under the sink.
- Commonly specified
- The Waterdrop G3 P800 is IAPMO certified with a 3:1 pure-to-waste ratio. The Waterdrop G3P600 was Bob Vila’s best tankless pick.
- Best for
- Tight cabinets, and households that care about water waste.
Countertop RO
Plug-and-play. Nothing gets cut, drilled or plumbed, and it comes with you when you move.
- Commonly specified
- The AquaTru Classic is the common plug-and-play countertop choice.
- Best for
- Renters and apartments around Union Center and Vauxhall.
Installation in a Union NJ home
An under-sink RO install needs four things: a feed water adapter on your cold line, a drain saddle clamped to the sink drain pipe, a dedicated faucet on the sink deck, and physical space for the tank. Tankless units add an electrical outlet. A capable DIYer can usually get through it in two to three hours; we do it in about one, and we leave the cabinet dry.
New Jersey plumbing code generally requires an air gap on an RO drain connection. It is a small detail that gets skipped constantly on self-installs and DIY jobs, and it is the kind of thing that shows up on a home inspection later. We install it correctly.
Worth knowing before you buy
If you are on a private well, do not put in RO alone. Untreated well water clogs prefilters within weeks and will ruin a membrane. Wells need sediment, iron and hardness handled upstream first — we size that whole chain, not just the RO.
Service schedule & running cost
Every filtration system is a maintenance commitment, and the honest number matters more than the purchase price. Here is what this one asks of you. We track your intervals and remind you.
| Task | Interval |
|---|---|
| Sediment and carbon prefilters | Every 6–12 months |
| RO membrane | Every 2–3 years |
| Carbon polishing filter | Annually, typically |
| Tank pressure check | At each prefilter change |
Check it yourself — independent sources
We would rather you verified this than took our word for it. None of these are ours, none of them sell equipment, and all of them are free to read before you spend anything.
- US EPA — Ground Water & Drinking Water Background on nitrates, arsenic and the dissolved contaminants RO targets.
- NSF International NSF/ANSI 58 is the standard that matters for reverse osmosis. Verify the listing.
- Water Quality Association Independent trade body with plain-language explainers on treatment methods.
Still working out which system you need? Start with our full list of water treatment services in Union, read how we test before we sell, or book a free on-site water test. Most Union homes need one or two of these systems — not all six.
Reverse Osmosis FAQs
Do you need a licensed plumber to install a reverse osmosis system?
For a standard under-sink RO system, no — it connects to the existing cold supply under your sink and our technicians install it directly. Where a licence does come in is if the job also involves main-line work, which is regulated under the New Jersey Uniform Construction Code (N.J.A.C. 5:23) and needs a licensed plumber in Union Township. The one part of an RO install that inspectors do care about is the drain connection, which needs a proper air gap.
What is the difference between a reverse osmosis system and a carbon filter?
Carbon works by adsorption — contaminants stick to the surface of the media as water flows past — so it is excellent on chlorine, taste, odour and organic chemicals but does nothing about dissolved minerals, nitrates or hardness. Reverse osmosis physically pushes water through a membrane fine enough to leave most dissolved substances behind, so it handles a far wider range including arsenic and nitrates. The practical difference is scope and speed: carbon treats the whole house quickly, RO treats one tap slowly.
Who handles running RO water to a refrigerator ice maker?
We do, and we recommend it, but it needs planning rather than a tee fitting on the way out the door. RO produces water slowly, so a fridge line drawing from a small tank can leave you short at the drinking tap, and long runs of tubing need to be food-grade and properly supported. Tell us at the quote stage and we will size the tank for both.
Does an RO drain connection need a permit or an air gap in Union?
The air gap is the important part. RO systems discharge to your sink drain, and under the New Jersey Uniform Construction Code (N.J.A.C. 5:23) that discharge generally has to be air-gapped so waste water can never siphon back into the system. It is the single most common thing inspectors by Union Township's building department pick up on. Whether a permit is required for a point-of-use system varies by municipality, and we check yours before we quote.
Water is leaking under my sink from the RO unit — is that an emergency?
Yes, treat it as one. An RO system holds a pressurised tank and half a dozen push-fit joints inside a closed cabinet, so a small drip can become a soaked subfloor overnight and cabinet bases are rarely waterproof. Shut the feed valve on the cold supply line first, then call us — we answer 24 hours a day and will talk you through it while we are on the way.
How long does an RO membrane last before it needs replacing?
Prefilters generally run six to twelve months and the membrane itself two to three years, but the membrane life depends almost entirely on whether the prefilters were changed on time. Chlorine destroys RO membranes, so a carbon prefilter left in past its life is effectively feeding the membrane the one thing that kills it. On a private well those intervals shorten considerably unless the water is pre-treated for sediment, iron and hardness first.
Union Township Water Pressure, Cabinet Space and RO Performance
Reverse osmosis is unusually sensitive to incoming water pressure, and that is a real constraint in parts of Union Township where postwar homes sit at the end of long service runs or on upper floors. Below roughly 40 psi a tank-based system fills slowly and wastes more water, which is the single most common complaint we get called out to fix on units someone else installed. A permeate pump or a tankless unit solves it, but only if somebody measured the pressure first. We serve every neighbourhood in Union Township and we check static pressure and cabinet clearance before quoting, rather than discovering the problem on install day.
Why Top Filtration
Why RO Belongs at the Tap, Not on Your Main Line
Plenty of companies will happily sell a homeowner a whole-house reverse osmosis system. We will not, because it is the wrong tool: RO produces water slowly, sends a meaningful share down the drain, and strips the minerals out of water you are only using to flush toilets and run laundry. The right answer is almost always RO at the kitchen tap plus carbon or a softener on the main line. Where main-line work is part of the plan, it falls under the New Jersey Uniform Construction Code (N.J.A.C. 5:23) and Union Township requires a licensed plumber and a permit, so we bring a licensed plumber in and handle the permit and inspection ourselves. Drain connections on RO units also need a proper air gap, which is the detail inspectors by Union Township's building department catch most often.
Pricing, explained
Reverse Osmosis Cost & Pricing
RO pricing turns on three things: whether the system is tank-based or tankless, how many stages it runs, and what your cabinet and countertop actually allow. A countertop unit needs no installation at all. A standard four-stage under-sink system with a dedicated faucet is a few hundred dollars installed, and rises if we have to drill a granite countertop or add a permeate pump for low pressure. Tankless units cost more and need an outlet under the sink. We scope it on site and quote in writing — call (973) 380-3906.
- System type — countertop, tank-based under-sink, or tankless on-demand
- Stage count and add-ons — remineralisation, pH balance, permeate pump for low pressure
- Install conditions — countertop drilling, drain air gap, available outlet and cabinet clearance
Get Your Quote Today
We answer 24 hours a day and can usually be out the same day across Union. If you would rather start with photos, send them and we will give you a range before we visit.
Call or Text (973) 380-3906Often Paired With
These usually come up in the same conversation
Water treatment works as a chain, and order matters. Here is what commonly sits alongside reverse osmosis in a Union home.
