Supreme Siltank and Siltank+ are the most suitable overhead water tanks for home rooftops. Rotationally moulded, BIS certified, and available from 200 to 10,000 litres, they offer UV stability, thermal insulation, and full capacity guarantee. Siltank+ additionally features Silver Nano Technology for 100% safe drinking water.
Water Storage Tanks
Supreme’s plastic water tanks are engineered for long-lasting, leak-proof performance, ensuring safe and hygienic potable water storage for years. Manufactured using advanced roto-moulding technology and 100% virgin, food-grade raw materials, our tanks deliver unmatched strength, UV stability, and bacterial resistance. Designed for residential, commercial, and industrial applications, our range includes overhead water tanks, underground water tanks, and loft tanks to suit every requirement.
Available in 3 layer water tanks, 4 layer water tanks, and 5 layer water tanks, our products come in a variety of capacities, including water tank 500 ltr, 1000 ltr, 2000 ltr and more. With a full capacity guarantee and superior build quality, Supreme water storage tanks are a trusted choice for homes, factories, hospitals, and institutions seeking efficient and long-lasting solutions.
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Why the Water Tank You Choose Matters More Than You Think
A water tank does more than hold water. It determines whether the water your family drinks stays uncontaminated through summer heat, whether algae finds its way into your supply, and whether the structure holding hundreds of litres above your roof holds its integrity for years. A tank made from substandard material degrades under UV exposure, develops microbial growth on interior walls, and loses structural strength over time. Selecting the right overhead water tank starts with understanding what separates a tank that merely stores water from water storage tanks engineered to protect it.
What Is the Difference Between a 3 Layer, 4 Layer, and 5 Layer Water Tank?
Each layer in a water tank serves a specific purpose — from blocking UV rays to keeping water safe for drinking. Here is what each construction offers:
3 Layer Water Tanks
The essential configuration for standard residential use. The outer UV-stabilised layer prevents sunlight degradation, the black middle layer blocks sunray entry to stop algae formation, and the innermost food-grade layer ensures water remains safe for drinking.
4 Layer Water Tanks
Adds a foam insulation layer to the 3-layer construction. This keeps water cool in summer and prevents it from getting too cold in winter — suited for homes in regions with intense heat or temperature variation.
5 Layer Water Tanks
Built for premium and high-demand applications. The extra-thick foam layer provides superior thermal insulation, while the additional structural layer reinforces the tank against impact and environmental stress — ideal for areas with extreme weather conditions.
Which Water Tank Is Best for a Home Rooftop or Building Terrace?
Supreme's Siltank and Siltank+ are the most trusted water tanks for home rooftops and building terraces across India. Rotationally moulded for maximum strength, both ranges are manufactured using 100% virgin raw material — free from any odour or taste — and meet and exceed BIS standards. Full capacity is guaranteed, unlike commercial tanks where stated and actual capacity often differ.
Siltank
Overhead Water Tanks and Loft Tanks Available from 100 to 10,000 litres in two, three, and four-layered designs, Siltank plastic water tanks come in Black, White, Yellow, Blue, Brown, and Green colours. The four-layered thermally insulated variant keeps water cool in summer and prevents it from getting too cold in winter. Loft tanks are available from 100 to 1,000 litres in various sizes. Whether you need a water tank 500 ltr for a compact installation or a water tank 2000 ltr for a larger household, Siltank covers the full range.
Siltank+
Overhead Water Tanks with Silver Nano Technology Siltank+ introduces Silver Nano Technology in the innermost food-grade layer, providing effective protection against bacterial contamination and keeping water 100% safe for drinking even when stored for extended periods. Available from 300 to 10,000 litres in two, three, and four-layered designs, including a water tank 1000 ltr variant, these tanks come in Black, White, Yellow, Blue, Brown, and Green colours.
Which Water Tank Is Best for Hot Climates or Areas with Water Quality Concerns?
For homeowners in regions with intense heat or water quality challenges, Supreme offers two premium water storage tanks for homes — WeatherShield and CopperShield — each engineered for a distinct purpose.
WeatherShield
5 Layer Water Tank for Superior Thermal Insulation WeatherShield is Supreme's premium plastic water storage tanks range, built with a five-layer construction featuring an extra-thick foam layer. Lab tests have confirmed a temperature difference of 15-20°C between stored water and the ambient temperature — keeping water cool in summer and warm in winter. Available in 500, 750, 1000, and 1500 litres in Marble Beige, Granite White, and Golden Yellow colours, these tanks are rotationally moulded, virtually unbreakable, and come with an optional water level indicator and pump controller. The 5 layer water tank benefits are most evident in areas with extreme seasonal temperature variation.
CopperShield
4 Layer Tank with Copper Infused Antibacterial Protection CopperShield features a unique copper-infused inner layer that acts as a natural shield against bacteria, viruses, fungi, and algae — keeping stored water consistently fresh and safe. Built with a robust four-layer design, these tanks are available in 500, 750, and 1000 litres in an elegant Tan Copper colour, designed for health-conscious users in residential and commercial buildings.
Which Water Tank Is Easiest to Maintain and Clean?
Supreme's Ecosil, Optimus, and Cleano address three distinct priorities — affordability, insulation performance, and ease of cleaning — across residential and commercial applications.
Ecosil
Overhead Water Storage Tanks A blow-moulded, four-layer tank manufactured using 100% virgin food-grade HDPE raw material. Antibacterial, odourless, and maintenance-free, Ecosil is available in 500, 750, 1000, 1500, and 2000 litres in white colour — a reliable and economical option for residential and commercial buildings.
Optimus
5 Layer Water Tank for High-End Insulation A five-layer rotationally moulded tank with an extra-thick insulation layer, designed to maintain optimal water temperatures regardless of external weather conditions. Antibacterial inner layer, UV-resistant outer layer, and inbuilt locking provision on covers. Available in 500, 750, and 1000 litres in White, Pearl Blue, and Icky Green colours.
Cleano
Easy Cleaning Water Tank Cleano is purpose-built for effortless maintenance. Its uniquely conical-shaped bottom ensures complete drainage of dirt and water during cleaning, leaving no residue and reducing clogging in plumbing fixtures. A three-layer tank manufactured from 100% virgin food-grade raw material, available in 1000 litres only in white colour — particularly suited for installations on sloped surfaces.
How Do I Choose the Right Water Tank Size for My Home or Building?
The right capacity depends on the number of occupants, daily water consumption, frequency of supply, and the type of installation. As a general reference, a water tank size for family of 4 typically requires between 1,000 and 2,000 litres for overhead storage, while larger households or buildings with irregular supply may need a water tank 5000 ltr or above.
Overhead and Loft Water Tanks
For rooftop or terrace installations, Supreme's Siltank range covers 200 to 10,000 litres. For compact indoor spaces, loft water tanks are available from 100 to 1,000 litres — space-efficient and designed specifically for installation in confined areas while maintaining the same quality standards as overhead tanks. Siltank also offers horizontal overhead tanks in 1,000, 1,500, and 2,000 litre capacities — a practical choice where vertical height is restricted.
Underground Water Tank
For properties requiring below-ground storage — particularly where rooftop installation is not feasible or where water supply is highly irregular — an underground water tank provides a reliable solution. Supreme's Amrutam range addresses this need, designed specifically for underground water storage applications.
Why Are Supreme Water Tanks Trusted Across India?
Supreme's range of overhead water tanks is manufactured using 100% virgin raw material, rotationally moulded for maximum strength, and rigorously tested to meet and exceed BIS standards. Every tank in the range guarantees full stated capacity — unlike commercial alternatives where actual and stated capacity frequently differ. From a water tank 500 ltr for a compact home installation to a 10,000 litre tank for large commercial buildings, Supreme's plastic water tanks are built to deliver safe, clean water storage across residential, commercial, and industrial applications throughout India.
Frequently asked questions
What is the difference between a 3 layer, 4 layer and 5 layer water tank?
In a 3 layer water tank, the outer UV-stabilised layer prevents sunlight degradation, the black layer blocks sunray entry to stop algae, and the inner food-grade layer keeps water safe. A 4 layer water tank adds a foam insulation layer to maintain water temperature across seasons. A 5 layer water tank incorporates an extra-thick foam layer with additional structural reinforcement for superior insulation and durability in extreme conditions.
Which water tank material is safest for drinking water?
Plastic water tanks manufactured from 100% virgin food-grade raw material are safest for drinking water storage. Supreme's range uses virgin LLDPE/HDPE raw material with no rework material — ensuring water remains free from odour, taste, and contamination regardless of storage duration.
How do I choose the right water tank size for my family?
A family of 3-4 typically requires a 1000 ltr water tank. Larger families or homes with irregular water supply should consider a 2000 ltr water tank or above. For very large households or commercial needs, 5000 ltr water tanks and above are available in Supreme's Siltank range up to 10,000 litres.
What is the minimum tank capacity recommended for a 3 bedroom home?
A minimum of 1,000 to 1,500 litres is recommended for a 3 bedroom home under normal water supply conditions. If supply is irregular or the household has more than 4 occupants, a 2000 ltr water tank is more appropriate.
Which water tank is best for storing drinking water?
Supreme Siltank+ with Silver Nano Technology is specifically designed for safe drinking water storage. The innermost food-grade anti-microbial layer with silver nano technology provides effective protection against bacterial contamination, keeping water storage tanks 100% safe for potable use even over extended periods.
What is the difference between an overhead and underground water tank?
An overhead water tank is installed on a rooftop or elevated platform and works on gravity to distribute water through the building. An underground water tank is installed below ground level — suited for properties where rooftop installation is not feasible or where large reserve storage is required. Supreme's Siltank range covers overhead storage; the Amrutam range is designed for underground water storage.
Which water tank is best for a hot climate?
Supreme WeatherShield is best suited for hot climates. Its five-layer construction with extra-thick foam insulation maintains a temperature difference of 15-20°C between stored water and ambient temperature — lab tested and confirmed. Available in 500 to 1500 litres, these plastic water storage tanks keep water cool even during peak summer.
Which water tank lasts the longest in extreme heat conditions?
Supreme WeatherShield 5 layer water tanks are engineered for extreme heat conditions. The UV-resistant outer layer prevents degradation and cracking, while the extra-thick foam layer maintains structural and thermal performance regardless of external temperature. All tanks are rotationally moulded for maximum strength and durability.
What is a loft water tank used for?
A loft water tank is a compact overhead tank designed for installation in confined indoor spaces such as lofts or utility areas. Supreme's Siltank loft tanks are available from 100 to 1,000 litres — maintaining the same virgin raw material and BIS quality standards as full-size overhead tanks.
How do I choose between an overhead and underground water tank?
Choose an overhead water tank when gravity-fed water distribution is needed across floors — suitable for most residential and commercial buildings. Choose an underground water tank when rooftop installation is not feasible, space is limited above ground, or large reserve storage is needed. Supreme's Amrutam range is designed specifically for underground water storage applications.
Which water tank is best for a commercial building?
For commercial buildings, Supreme's Siltank range in higher capacities — 3,000, 5,000, 7,500, and 10,000 litres — is the appropriate choice. These water storage tanks are rotationally moulded, BIS certified, and carry a full capacity guarantee, making them reliable for large-scale commercial water storage requirements.
How do I prevent algae from growing in my water tank?
Algae growth is caused by sunlight entering the tank. Supreme plastic water tanks feature a dedicated black layer specifically designed to block sunray entry and prevent algae formation. Keeping the tank covered with a tightly fitted lid at all times further reduces the risk.
Which water tank is easiest to maintain?
Supreme Cleano is purpose-built for easy maintenance. Its uniquely conical-shaped bottom ensures complete drainage of dirt and water during cleaning, leaving no residue. Supreme Ecosil is also maintenance-free — antibacterial, odourless, and manufactured from 100% virgin food-grade HDPE material. Both are available as plastic water storage tanks for residential and commercial use.
Are plastic water tanks safe for storing water long term?
Yes — provided they are manufactured from 100% virgin food-grade raw material. Supreme's entire water tanks for home range uses virgin LLDPE/HDPE with no rework material, ensuring water quality is unaffected even during long-term storage. All tanks meet and exceed BIS standards and carry a full capacity guarantee.