In this guide
Short answer: for storing drinking water in Kerala, a food-grade SS-304 stainless steel tank is the better choice for most families. Plastic tanks cost less upfront but grow algae faster, can leach over time, and degrade under Kerala’s sun, while stainless steel stays hygienic for well over a decade and is backed by a 10-year warranty.
- Stainless steel keeps drinking water fresher: no algae film, no odour, no chemical leaching.
- Kerala’s sun and humidity shorten plastic tank life to roughly 5 to 10 years.
- SS-304 tanks are built to last well over a decade and carry a 10-year warranty.
- Plastic still makes sense for tight budgets and non-drinking water storage.
- Many families choose both: steel for kitchen supply, plastic for bathrooms and flushing.
Why this comparison matters in Kerala
Your overhead tank is the last stop before your drinking water reaches your kitchen. In most Kerala homes, water sits in that tank for hours in 30 to 35 degree heat and near total humidity. The material it sits in matters more here than in almost any other part of India.
Stainless steel vs plastic: side by side
| Skywell Stainless Steel (SS-304) | Ordinary Plastic | |
|---|---|---|
| Water hygiene | Algae-resistant, no odour | Can grow algae, hold odour |
| Chemical safety | Food-grade, no leaching | Can leach over time |
| Lifespan | Built to last well over a decade | Degrades in sun and heat |
| Kerala climate | Handles sun, monsoon, coastal air | Can crack and fade |
| Warranty | 10-year warranty | Usually limited |
| Long-term value | Higher upfront, lasts far longer | Lower upfront, replaced sooner |
Why plastic struggles in Kerala
Plastic is a good material, but Kerala is hard on it. Intense UV radiation breaks down the outer polymer layer year after year. The result is familiar: faded walls, a chalky surface, micro cracks around the neck, and an interior that algae and biofilm cling to more easily. Once biofilm forms, water can develop a taste and smell that no amount of boiling fully hides.
What SS-304 actually means
SS-304 is a food-grade stainless steel used worldwide for dairy, food processing, and drinking water systems. It is non-reactive, so it does not leach anything into your water, and its smooth surface gives algae nothing to cling to. It also shrugs off coastal air, which corrodes lesser metals quickly. Skywell tanks are made from genuine AISI 304 and are manufactured in our own ISO 9001:2015 certified plant in Kanjikode, Palakkad.
The honest math: cost versus value
A stainless steel tank costs more on day one. Spread over its life, the picture changes. A plastic tank replaced twice in 15 years, plus the cleaning and the water quality you tolerated along the way, often ends up costing more than one steel tank that simply lasts. When the water your family drinks is part of the calculation, most buyers find steel worth the difference.
When plastic is still the right call
Plastic has its place. If you are on a tight budget, storing water for toilets or gardening, or setting up temporary housing, a quality three-layer plastic tank from a trusted maker is a sensible choice. We make those too, and we make them well: food-grade virgin inner layer, UV-stabilised exterior, and a 10-year warranty.
Our verdict
For drinking water in a Kerala home, choose food-grade stainless steel. For every other storage need, choose a quality plastic tank that fits your budget. Explore our stainless steel water tanks and our plastic water tanks, or send us your family size on WhatsApp and we will recommend the right tank, no obligation.