RO Purifier Maintenance Cost: Up to ₹21,300

Up to ₹21,300 over five years. That is where RO purifier maintenance cost lands on this site's model, with top-of-market parts and a technician twice a year, all spent after the box is paid for. The cheaper buy, if your tap water tests below 500 mg/L of dissolved solids, is a UV+UF purifier, which has no membrane to replace.

What makes up RO purifier maintenance cost?

Four lines make up the bill: filters, the membrane, the UV lamp and the service visits, and on a five-year model built from June 2026 Indian part prices, the visits outweigh any single part.

Most advice fixes on the membrane, the dearest part. Wrong fear, in our view: on our assumptions it is changed twice in five years, while the doorbell rings ten times. The prices below are reported ranges from RO Care India's 4 June 2026 Kolkata price guide; it is a service network, not a brand.

Worked example: an RO+UV purifier on hard city water, top-of-range parts, a service visit every six months. Our assumptions, not the guide's: filters yearly, the membrane twice in five years, the UV lamp once.

• Sediment filter (₹150-400) plus carbon filter (₹200-500), one set a year: ₹900 x 5 = ₹4,500.
• RO membrane (₹1,200-3,500), twice: ₹3,500 x 2 = ₹7,000.
• UV lamp (₹800-1,800 with installation), once: ₹1,800.
• General service visit (₹400-800), twice a year: ₹800 x 10 = ₹8,000.

That totals ₹21,300, about ₹355 a month. At the bottom of every range it falls to ₹8,950, and since the guide ties membrane prices to quality and brand compatibility, much of that gap is the part you accept. Your own version takes under a minute: last service bill times ten, plus five years of filter sets at your technician's price. That is your floor before any membrane.

It is the same ownership sum as the payback for 3-star and 5-star refrigerators, and it belongs before the festive sale, when a list price dressed up as a discount flatters the box.

Four more numbers decide whether your bill stays near that floor. Two come from the same guide, the others from BIS's IS 10500:2012 standard and the National Green Tribunal's May 2019 order, which the environment ministry reported to the Lok Sabha on 13 March 2020.

The overhaul is the figure to plan around. Skip visits to save money and the saving can return as that one bill, bigger at either end of the price range than a year of routine upkeep.

RO or UV: which costs less to keep?

UV+UF costs less to keep because it has no RO membrane to replace, though the saving only counts if your tap water already sits under 500 mg/L of dissolved solids, BIS's acceptable limit.

Find your row, then read across at your technician's price. The UV+UF row drops the membrane but omits the UF cartridge, which the guide does not price, so read it as a floor. The last row is an RO with four years of parts and service included, leaving only year five to pay.

The tinted cell is the worked example. Midpoint prices take ₹6,175 off it; UV+UF at the same prices removes the ₹7,000 membrane line.

That last row describes a real product. Eureka Forbes's product page listed the Aquaguard Aspire Glow 4X, an RO+UV model, at ₹18,999 as of 22 October 2026, promising "zero filter cost, zero spare cost, and zero service cost for full 4 years". If both membrane changes and the lamp fall inside those years, the cover absorbs ₹18,800 of our high-end bill, about the purifier's price. That is the company's claim, not a tested result. Our call: where an RO is needed, an all-in warranty beats a separate AMC, if the card agrees.

What TDS level actually needs an RO?

Above 500 mg/L, the acceptable limit in BIS's IS 10500:2012 drinking water standard, an RO earns its upkeep; below it, a meter reading alone cannot clear the water, because it measures dissolved solids, not germs or trace arsenic.

Regulators have drawn the same line. The National Green Tribunal's 20 May 2019 order directed the environment ministry to prohibit RO below 500 mg/L, the ministry told the Lok Sabha. The Supreme Court stayed the key directions of a tougher NGT order of 1 December 2021 "until further orders" on 1 March 2022, Verdictum reported, and we found no report of the stay lifting by October 2026. No ban binds you.

Here is the grey area, and it is opinion, not rule. Water under the limit that tastes salty passes BIS and can still taste poor; an RO to fix that is defensible, just not a safety purchase. Most homes need the test, not the machine. Or rather, most homes on a municipal line do.

• Borewell or tanker water: a meter cannot see arsenic or bacteria, so get a lab test against the IS 10500 drinking water limits first.
• The MRP gap: that Eureka Forbes page shows a ₹31,000 MRP; read what India's 2026 e-commerce rules make sellers show about prior prices before calling the gap a saving.
• Reject water: on low-TDS water, an RO drains water for no safety gain.
• AMC quotes: price any contract against two single visits and one filter set a year.

This week, buy or borrow a TDS meter and test the kitchen tap. Under 500 mg/L on a municipal line, buy a UV+UF and keep the membrane money. Over it, buy the RO, and sign no AMC until you have set it against the ₹21,300 high case.