Water can vs RO purifier: which costs less for a Kerala home?
For a family of four, a home RO purifier usually costs less per litre over three years if your water source is reliable and you keep up servicing. Jar delivery costs more per litre but needs no upfront spend, no maintenance and no wasted water, and keeps working when well or tap water turns muddy in the monsoon. Many Kerala homes end up using both.
This is not a “jars always win” article. An RO purifier is a good choice for many homes. The right answer depends on your water source, how many people you are, and how much hassle you are willing to take on.
Three-year cost comparison (family of four)
| Cost item | RO purifier (estimate) | Refillr jars |
|---|---|---|
| Upfront | Purchase + installation (typically ₹12,000–₹25,000) | Refundable deposit only (₹300 per jar on the Home Plan) |
| Filters & membrane | Replacements every 6–18 months (often ₹2,000–₹5,000 a year) | None |
| Annual service contract | Often ₹2,500–₹5,000 a year | None |
| Electricity | Small (a few hundred rupees a year) | None |
| Water wasted | Many RO systems reject 1–3 litres for every litre purified | None at home |
| Water bought | — | About 20 jars a month × ₹65 = ₹1,300 a month |
When an RO purifier makes more sense
- You have a steady municipal or borewell supply with high dissolved solids (hard, salty water).
- You are a large household that uses purified water for cooking too.
- Someone at home is happy to track filter changes and service visits.
When jar delivery makes more sense
- Your well water turns muddy or unsafe during the monsoon.
- You rent, move often, or do not want to install equipment.
- Your water already has low dissolved solids and RO would strip it further and waste water.
- You want an office, shop or clinic supply with GST invoices and no maintenance.
The common Kerala answer: both
A lot of homes in Kottayam keep a purifier for everyday use and a few jars for the monsoon, for guests, or as a backup when the purifier needs service. Because Refillr’s prepaid refills never expire, keeping a small Solo pack for these situations does not waste money.
Before buying an RO unit, get your water tested. If the dissolved solids are already low, a UV or UF purifier — or simply good-quality packaged water — may be a better fit than reverse osmosis.
Prepaid refills that never expire. Refundable jar deposit. No lock-in.
Frequently asked questions
Is a water can cheaper than an RO purifier?
Per litre, a well-maintained RO purifier is usually cheaper over several years. Jar delivery costs more per litre but has no upfront cost, no servicing and no wasted water.
Do RO purifiers waste water?
Many household RO systems discard 1–3 litres of water for every litre they purify, depending on the model and your water quality.
Should I use jar water or RO water during the monsoon?
If your well or tap water becomes muddy during heavy rain, RO filters clog faster. Many families switch to packaged jar water for drinking and cooking during those weeks.
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