A gravity-based water purifier uses no electricity, drawing water from an upper chamber through filters into a lower chamber under natural gravitational force. This makes it ideal for areas with unreliable power supply and significantly cheaper than RO purifiers, ranging from approximately Rs. 1,200 to Rs. 5,500. However, gravity-based purifiers do not significantly reduce Total Dissolved Solids (TDS) and cannot reliably remove dissolved chemicals or heavy metals — they are suitable only for water sources with low TDS and no significant chemical contamination, typically treated municipal supply.
- How it works: Water flows from an upper chamber through filter stages (sediment, activated carbon, sometimes UF) into a lower storage chamber, using only gravity
- Price range: Approximately Rs. 1,200 (basic 14L models) to Rs. 5,500 (23L models with UF stage) — significantly cheaper than RO purifiers
- Best suited for: Low-TDS municipal or treated water with no significant chemical or heavy metal contamination
- Not suitable for: Borewell water, tanker water, or any source with high TDS, dissolved chemicals, fluoride, arsenic, or heavy metals — an RO purifier is required for these
- Maintenance: Filter cartridges typically need replacement every 4 to 6 months, depending on usage and water quality
- Key trade-off: No electricity dependency and lower cost, against significantly narrower contaminant removal than RO or UV systems
You can buy gravity-based water purifiers and explore electric water purifiers on Easy EMIs at over 1 million partner stores across 4,000 cities, including Reliance Digital, Croma, and Vijay Sales.