How Often Should a Water Purifier Be Serviced in Delhi?

How often does a purifier actually need a service visit?

The honest answer is that your water sets the interval, not the calendar — but a visit roughly once a year, with cartridge changes as needed in between, is what most Delhi NCR households end up doing. These are the factors that pull the interval shorter.

• Your supply source. Borewell and tanker-fed homes generally need attention sooner than a household on a consistent municipal line, because of the sediment load.
• Your building’s storage. A sump and overhead tank that are rarely cleaned deliver silt to your pre-filters every day. Sorting the tank out lengthens the purifier interval — see our tank cleaning guide.
• Hardness. Hard water scales membranes, pumps and valves across NCR. A unit on hard water shows its age faster.
• How much you draw. A large household in a Delhi summer runs the machine many times more than a couple in winter. Volume, not months, is what wears consumables.
• Whether a UV stage is fitted. A UV lamp is one of the few components that genuinely runs on elapsed time rather than water volume, so it sets its own schedule.
• What the machine is telling you. Slower filling, a change in taste, a rising output TDS reading, new noises or a longer running cycle are all reasons to bring a visit forward regardless of the date.

What a proper service visit should include

Print this or keep it on your phone. Ask for each item, and ask what was found rather than just whether it was done.

• Measurements taken before anything is touched. Input TDS, output TDS, and ideally the inlet pressure. Without a “before” reading, nobody can show you the visit achieved anything.
• Inspection of every stage, in order, with the old cartridges shown to you. A sediment filter that comes out caked in silt is useful information about your water and your real interval.
• Cartridge replacement where warranted, not automatically. Ask why each one is being changed.
• The storage tank sanitised. This is the item skipped most often and the one that most affects taste. A technician who never opens the tank has not done a full service.
• Tubing and fittings checked for hardening, kinks, weeping joints and scale around connectors. Most RO leaks start at a fitting.
• The auto shut-off and float tested. The machine should stop when the tank is full. A shut-off that never closes wastes water around the clock — see our reject water guide.
• The drain flow restrictor checked. Almost nobody asks. A worn or wrongly rated restrictor quietly raises how much water goes down the drain.
• Pump and adaptor condition noted, including any unusual noise. Delhi voltage is hard on the plug-in adaptor.
• Measurements repeated afterwards, and written on the job sheet with the date. This is the single most useful thing a service can leave behind.

How to supervise the visit without being a nuisance

You do not need technical knowledge to make a service visit better. You need to be in the room and ask four questions.

• “What are the readings before you start?” Ask for input and output TDS to be measured and written down first.
• “Can I see the old part?” For every cartridge or component replaced. This is normal and reasonable, and it ends most disputes about whether a change was needed.
• “What is the reading now?” After the work. A membrane change that does not improve the output reading needs explaining.
• “What did you find that I should watch?” A good technician will tell you the pump sounds tired, or a tube is hardening, or your pre-filter is loading unusually fast. That warning is worth more than the parts.
• Keep a record on the machine itself. A strip of tape on the housing with the date of each change, written in marker, outlasts every receipt and settles every future argument about what was done when.
• Photograph the job sheet. Especially if you rent, or if an AMC is involved.

Run the water for a minute or two after any service and check under the unit for damp before the technician leaves. A weeping fitting is far easier to fix while they are still standing there.

Signs the service you are getting is a thin one

None of these prove bad faith on its own. Two or three together mean you are paying for a cartridge swap and calling it maintenance.

• No meter comes out of the bag. No before reading, no after reading, no numbers on the job sheet.
• Everything gets replaced every time, regardless of condition, and the old parts are not shown to you.
• The storage tank is never opened. Ask directly whether it was sanitised.
• A diagnosis arrives before any inspection. Being told on the phone that you need a membrane, before anyone has seen the machine, is a sales script.
• Pressure to replace the whole unit for a taste or flow complaint. Those are almost always a specific stage, the tank or the pre-filters.
• No job sheet at all. You should be left with a record of what was done, what was found and what was measured.

Our RO repair guide and RO service and TDS guide cover how to judge a quote once you know what is genuinely needed.

Should the service be under an AMC or paid per visit?

Both work. Which suits you depends on how much your water is going to demand and on how much you want to think about it.

• An annual contract suits harsh water and busy households — borewell or tanker supply, heavy sediment, a large family, or anyone who will otherwise forget until the water slows to a trickle. The visits get scheduled whether you remember or not.
• Pay-per-visit suits a light user on a consistent supply who is willing to watch the machine and call when something changes.
• Read what the contract actually covers. Membranes, pumps, tanks and adaptors are frequently excluded from cheaper contracts, and the number of included visits varies. Our AMC guide sets out the questions to ask before signing.
• Either way, the checklist above still applies. A contract does not make a ten-minute visit thorough. Ask for the same measurements and the same tank sanitisation you would ask for on a paid visit.
• If you rent, find out whether the landlord already holds a contract on the unit before arranging your own — see our rented flat purifier guide.