Indicative market ranges across Delhi NCR — not XpertWorker prices. Each professional sets their own charge and quotes you free.
Everybody in Delhi NCR knows the water is hard. It is the first thing anyone says about it. And yet almost nobody can answer the only question that follows from it: so how often should I actually be changing my filters, and what should that cost me in a year?
The reason is that the answer is not on the calendar. It is in your water. A home on Delhi municipal supply and a home running off a Noida borewell are asking their RO to do two very different jobs, and they should not be on the same service schedule — no matter what the sticker on the machine says. This guide connects the two: what the water in your building is likely doing to your purifier, what each part genuinely costs to replace, and how to tell an honest service call from a shopping trip through your machine.
A note on these numbers. XpertWorker is a marketplace, not a service company. We do not set any professional's price and we never charge you a paisa. Every figure below is an indicative market range reflecting what independent technicians in Delhi NCR generally charge — a guide to help you judge a quote, not a quote itself. The technician you choose sets their own price, quotes you free before starting, and is paid by you directly. We also do not recommend purifier brands or models; the advice here is about components and intervals, which is what actually determines your bill.
In this guide
RO service and repair costs in Delhi NCR
These are the ranges independent RO technicians across Delhi NCR generally quote in 2026. Labour and parts are usually separate lines, and they should be — a "service" and a "filter change" are not the same transaction, and a technician who fuses them into one number is a technician you cannot audit.
| Job | Typical market range | What it usually includes |
|---|---|---|
| RO general service / cleaning | ₹300–600 | Clean, check flow and pressure, sanitise the tank. No parts included |
| Water / TDS testing | ₹100–300 | The cheapest thing on this list, and it settles most arguments |
| Sediment / carbon filter (per filter) | ₹250–600 | The consumables. Priced each — most machines have two or three |
| RO membrane replacement | ₹1,200–2,500 | The big one. Its life depends on your input TDS, not the calendar |
| UV lamp replacement | ₹500–1,200 | Only if your unit has UV. Lamps dim long before they die |
| Pump / SMPS / adaptor replacement | ₹600–1,800 | When the machine hums but will not fill, or will not start at all |
| Storage tank / faucet repair | ₹200–600 | Leaky tank, dripping dispensing tap, cracked float |
| RO repair (by fault) | ₹400–1,500 | Diagnostic + labour where the fault is not a straight part swap |
| RO installation (labour) | ₹400–800 | New unit fitted, tapped in and commissioned |
| Wall-mount fixing / relocation | ₹300–700 | Moving a unit, or re-mounting one that was hung badly |
| Annual AMC — service only (per year) | ₹1,000–2,000 | Scheduled visits and labour. Filters and parts billed separately |
| Annual AMC — with filter changes (per year) | ₹1,500–4,000 | Visits plus the routine consumables. Read the fine print — see below |
Indicative Delhi NCR market ranges, 2026. Each professional sets their own charge and quotes you free before starting. Parts are normally billed on top of labour.
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Get free quotesWhat TDS actually is — and what Delhi NCR's water is doing to your RO
TDS = Total Dissolved Solids. It is a single number, in parts per million (ppm) or milligrams per litre (mg/L), for everything dissolved in your water that is not water: calcium, magnesium, sodium, chlorides, sulphates, nitrates, and whatever else the ground or the pipe contributed. It is not a purity score and it is not a safety score — a low TDS does not mean water is safe (it says nothing about bacteria), and a moderate TDS does not mean it is dangerous.
What TDS is excellent at telling you is how hard your RO membrane is working. And that is the number that decides your annual bill.
For context — and these are widely reported, typical figures, not our measurement:
- Delhi's piped municipal supply is commonly reported in the region of 500–600 ppm TDS, though it varies a great deal by locality and by season.
- Borewell and groundwater across parts of NCR — Noida, Greater Noida, Ghaziabad, parts of Gurgaon and Faridabad — is routinely reported far higher than the piped supply, sometimes several times higher.
- The BIS desirable limit for TDS in drinking water is 500 mg/L (with a higher permissible limit in the absence of an alternate source). Which is precisely why an RO is not a lifestyle purchase in this city.
Here is the mechanism, and it is the whole guide in one paragraph. An RO membrane works by forcing water through a barrier so fine that dissolved salts cannot follow. The more salt there is on the input side, the harder the pump has to push, the more of those salts precipitate onto the membrane surface as scale, and the faster that membrane fouls. Higher input TDS is not a mild inconvenience for a membrane — it is the thing that kills it. So a home drawing hard borewell water in Noida will genuinely wear out a membrane sooner than a home on Delhi municipal supply, doing nothing differently. Same machine, same usage, different water, different bill.
Which is why you should own a TDS meter. A handheld TDS meter is one of the cheapest pieces of equipment you can buy for a home, and it converts every argument about your purifier from opinion into a reading. Or have it done — Water / TDS testing is the lowest-priced line on the table above, and it is money better spent than almost anything else on it.
Take two readings, always: input and output. Input is the raw water going in (from the tap that feeds the machine). Output is the purified water coming out. That pair, tracked over time, is the entire diagnostic:
| What the two readings show | What it means |
|---|---|
| Output far below input, and stable over months | The membrane is doing its job. Nothing needs replacing. Say no |
| Output creeping up over months, input unchanged | The membrane is fouling. This is the honest signal that it is nearing the end |
| Output close to input | The membrane is spent or bypassed. A replacement is genuinely due |
| Input has climbed (e.g. you switched to borewell / tanker) | Your machine's workload just went up. Expect shorter intervals from here |
| Nobody took a reading at all | Nobody has diagnosed anything. Do not authorise a part |
The real replacement schedule, component by component
The single most expensive misunderstanding about ROs is that "servicing an RO" is one thing that happens on one interval. It is not. The parts inside your machine have completely different lifespans, different jobs and different price tags, and lumping them together is exactly what an upsell relies on.
| Component | What it does | Roughly how often — and what really drives it |
|---|---|---|
| Sediment filter | Catches grit, silt, rust and particles before they reach anything expensive | The shortest life of the lot. Driven by how dirty your water is, not how hard it is. Tanker supply, monsoon turbidity or old GI pipes can choke one in months. It is also the cheapest part in the machine — replacing it on time is what protects the membrane |
| Carbon filter (pre / post) | Strips chlorine, odour and taste. The pre-carbon also protects the membrane, which chlorine damages | Longer than sediment, shorter than the membrane. Its capacity is finite: once exhausted it stops adsorbing, silently. A funny taste or smell returning is the practical signal |
| RO membrane | The actual purification — the barrier that removes dissolved salts | The longest-lived and most expensive part. Life is set by your input TDS and by whether the cheap filters upstream were changed on time. This is why the two questions are linked: a neglected sediment filter kills membranes early. Change it when the output TDS climbs, not when the calendar says so |
| UV lamp (if fitted) | Kills bacteria and viruses that a membrane may not fully stop | Typically an annual item, and here the calendar is legitimate: a UV lamp dims long before it burns out. It can be glowing and doing nothing. That is the one component where "it still lights up" is not evidence it works |
| Pump / SMPS / adaptor | Pushes the water through the membrane; powers the unit | Not a consumable. Replace on failure only. It is never part of a routine service |
| Storage tank & faucet | Holds and dispenses the purified water | Not a consumable either — but the tank does need sanitising, which is what a general service is for |
The one intuition to take away: the cheap parts protect the expensive one. Sediment and carbon filters cost a fraction of a membrane — and their entire purpose in life is to keep grit and chlorine away from it. Skipping the cheap ones to save money is the most reliable way to pay for the expensive one early. If you only remember one thing about RO maintenance, remember that.
AMC vs pay-per-visit: which is actually cheaper?
An AMC is sold as the obvious, sensible, grown-up choice. Sometimes it is. Often it is not. It depends on your water and your usage, and the arithmetic is not hard — you just have to actually do it, which is what nobody does.
What the two things are. An Annual AMC — service only buys you scheduled visits and labour; every filter and every part is billed on top. An Annual AMC — with filter changes bundles the routine consumables into the fee. Note the ranges: on the table above, the filter-inclusive AMC costs meaningfully more than the service-only one, and that gap is precisely what you are betting on.
Do the sum yourself. Rather than trusting anyone's headline, price your own year honestly. Add up what you would genuinely spend paying as you go:
- How many RO general service / cleaning visits do you actually need in a year? For most municipal-supply homes it is a small number, not one a quarter.
- How many Sediment / carbon filter (per filter) changes — remembering the price is per filter, and your machine has more than one.
- Will you need an RO membrane replacement this year? On typical Delhi municipal supply, in a machine whose cheap filters were changed on time — very possibly not.
- A UV lamp replacement, if your unit has UV — roughly an annual item.
Now compare that total against the AMC bands. Two honest conclusions fall out:
| Your situation | What usually wins | Why |
|---|---|---|
| Municipal supply, moderate input TDS, light usage, filters changed on time | Pay-per-visit is often cheaper | You will not be consuming enough filters to earn back a filter-inclusive AMC. A service call now and a filter later is genuinely less money than a bundled fee. AMC is not automatically the win — and anyone who tells you it always is, is selling one |
| Borewell or tanker water, high input TDS, heavy usage, large family | AMC usually wins | You are burning through sediment and carbon filters, and the membrane is under real load. Multiple filter changes a year plus visits will clear the AMC band, and the AMC also caps a bad year |
| You will simply never remember to book a service | AMC wins on behaviour, not on price | A slightly worse deal that actually gets the sediment filter changed beats a better deal you never act on — because that neglected cheap filter is what kills the membrane |
Before signing any AMC, ask these four questions — the answers are where the value actually lives, and none of them are on the brochure:
- Exactly which parts are included, by name? "Filters included" almost always means sediment and carbon. It very rarely includes the membrane, and it may not include the UV lamp. Get the list.
- How many visits, and are extra visits free or chargeable?
- Is the membrane covered, and if not, what does it cost when it is due?
- Is it capped? Some AMCs cover a fixed number of filter changes, after which you pay anyway. If you are the high-TDS household the AMC is supposed to protect, that cap is the whole deal.
Red flags: how an RO upsell actually works
The RO trade is an easy place to overcharge, for one structural reason: you cannot see any of it. The parts are inside a sealed white box, they all look identical, they have no visible failure, and the customer has no way to verify a single claim. So the honest technician and the dishonest one say almost the same words. The difference is whether they show you a number.
- No TDS reading, before or after. This is the master red flag, and it makes all the others unnecessary. A technician who condemns a membrane without measuring your output TDS has not diagnosed anything. Ask for the input and the output reading, and ask to see the meter. An honest one is glad to show you — it is the evidence for their own recommendation.
- "The membrane must be changed every year." On typical municipal supply, in a machine whose sediment and carbon filters were replaced on schedule, a membrane very often lasts considerably longer than a year. An annual membrane change presented as a fixed rule — rather than as a conclusion from your rising output TDS — is a sales script, not a service. (On genuinely high-TDS borewell water, a short membrane life can be real. It still has to be shown, not asserted.)
- The part is condemned before the machine is opened. Diagnosis happens after inspection, not on the phone.
- Everything is due at once. The components have different lifespans, as the schedule above sets out. A visit that concludes the sediment, the carbon, the membrane and the lamp all need replacing today is describing an unlikely coincidence.
- Alarming talk with no evidence. Vague claims about what is in your water, unaccompanied by a reading, are a pressure technique. The number is cheap. Ask for it.
- You cannot keep the old part. Ask for the removed component back. It is a reasonable request, it costs nothing, and it keeps everyone honest.
- A price quoted only as one lump. Labour and each part should be separate lines. Fusing them is how a ₹250–600 filter hides inside a bill.
None of this means most technicians are dishonest — most are not, and a good RO technician is worth keeping for years. It means the trade has no natural check on the bad ones, so you have to supply it. One handheld meter and one question — "what is my output TDS?" — supplies almost all of it.
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