Brand: ZeroB
Ion Exchange engineering for genuinely difficult water
Our editorial score
Very good — recommended
Homes with iron staining, extreme hardness or nitrate problems — Bengal, Assam, Bihar and the hard-water belt.
If your water leaves orange stains in the sink, scales up a geyser in six months, or has a nitrate problem, you do not have a normal RO purchase — you have a water-chemistry problem, and most consumer brands will sell you a standard unit that dies early. ZeroB is the exception, because it is the domestic arm of Ion Exchange, which builds industrial treatment plants for a living.
Practically, that means the pre-treatment can be configured to your actual water rather than to a generic assumption. Get a lab test first, then talk to ZeroB about the right configuration. You will pay less than you would replacing a mis-specified membrane twice a year.
Every condition below is derived from this product's published specifications and from how it compares with the water purifiers we track — so you can check each one against your own room, supply or budget rather than take our word for it.
Your supply runs above 2,000 ppm TDS
The membrane is rated to 2,000 ppm. Feed it more and it will not fail dramatically — it will die early and quietly, and you will be buying membranes annually. Check your worst-season reading, not your average one.
Purifiers for high-TDS supply →Water wastage matters to you
The brand does not publish a recovery figure, so there is no way to know how many litres go to drain per litre purified. Only 2 of the 26 water purifiers we track publish this at all.
High-recovery purifiers →You live outside a metro or a major service town
ZeroB's service network is rated good rather than excellent. Filter availability and callout times are what decide whether a purifier is still running in five years, and they are worth checking for your pin code before you buy.
How we score service reach →Fair transparency. This is separate from our review score above — it measures how well documented, how supportable and how expensive to own this water purifier is, scored on 6 of 7 axes by formula, with no manual override. See the methodology.
| Axis | Score | Weight | Based on |
|---|---|---|---|
| Documentation | 6.7 | 15% | 8 of 12 tracked specs published |
| Running cost | 6.7 | 20% | ₹3,600 per year |
| 5-year cost of ownership | 4.8 | 20% | ₹32,490 over five years |
| Warranty & free service | 0.0 | 12% | 12 months warranty |
| Service & parts reach | 6.0 | 15% | ZeroB service network rated good |
| Energy efficiency | 9.4 | 8% | 40 W |
| Water recovery | Not scored | 10% | Not published |
| Purification | RO + UV + UF with hardness and iron pre-treatment options |
|---|---|
| Storage capacity | 7 litres |
| Purification capacity | 12 litres/hour |
| Max input TDS | 2000 ppm |
| Speciality | Configurable pre-treatment for iron, hardness and nitrate |
| Power | 40 W |
| Warranty | 1 year |
Specifications are from manufacturer literature and were checked at the last price-verification date. Brands occasionally revise stage counts, tank sizes and warranty terms without changing the model name — confirm against the current listing before purchasing.
The domestic brand of Ion Exchange, one of India's largest industrial water-treatment companies. That lineage shows: ZeroB is unusually strong on genuinely difficult water — iron removal, hardness, nitrate — and it is the brand to look at when a standard RO is not the right answer.
Tip
KENT
Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice.
View details
Aquaguard
Buyers who value service reliability and compact design over maximum tank capacity.
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KENT
Renters and anyone who cannot drill walls, but still needs full high-TDS RO purification.
View details
Pureit
Safety-first households, and anyone who has previously forgotten filter changes.
View detailsFree consultation · Pan-India
Tell us your city, your water source and your budget. For homes we will recommend the right technology — including telling you when a ₹3,000 purifier is genuinely enough. For offices, societies and factories, our team will size a system against your water report and send a specification-backed quotation.
Or email betterworkindia@gmail.com — attach a water analysis report and we can quote faster.
Homes
Right-sized recommendation for your TDS, not the most expensive unit
Offices & societies
25 LPH to 2,000+ LPH, sized on headcount and feed water
Industry
Pharma, food, textile, boiler feed — engineered to your specification
Service & AMC
Installation, repair and AMC with written response times