Our 20,000 to 49,999 litre water tanks are designed for sites that need substantial, dependable water storage. This category covers a broad range of high capacities, from a 20,000 litre water tank for large agricultural or commercial requirements through to tanks approaching 50,000 litres for major industrial, fire protection and site-wide water management projects.
A 20,000L water tank can provide a significant reserve for irrigation, commercial rainwater harvesting, livestock supply or manufacturing processes, while the larger tanks in this category support operations where water demand is continuous or particularly high. By comparing capacities across the full collection, you can select a tank that meets your current needs without overlooking future usage.
The right capacity will depend on your daily water use, the available space and how often the tank can be replenished. A 20,000 litre water tank may be suitable for a large farm, estate or commercial premises; while 30,000L water tanks and 40,000L water tanks can provide a larger buffer for industrial facilities, extensive irrigation systems and emergency reserves.
It is worth considering peak demand rather than average use alone. Large roofs can collect considerable volumes of rainwater during wet periods, while agricultural and industrial sites may need enough stored water to maintain operations during dry weather or interruptions to the mains supply.
The collection includes tanks designed for potable and non-potable storage, along with specialist configurations for more complex sites. WRAS-approved potable tanks are suitable for drinking water and applications where hygiene requirements must be carefully managed.
CAT 5 AB air gap tanks can help sites meet Fluid Category 5 requirements by preventing contaminated water from flowing back into the mains supply. Dedicated fire-fighting tanks provide large emergency reserves and can be fitted with suitable couplings and outlets for rapid access.
Some models are also reinforced for liquids with a higher specific gravity, including liquid fertiliser and molasses. This makes the wider 20,000 to 49,999 litre water tanks collection relevant for more than water storage alone, although the correct tank specification must always be used for the liquid being held.
Tanks within this capacity range are commonly manufactured from UV-stabilised polyethylene using a one-piece rotational moulding process. The lack of seams and welded joints reduces potential weak points, while the material is designed to resist impact, sunlight and prolonged outdoor exposure.
Different outlet sizes and fitting positions may be available to help connect pumps, filters and existing pipework. Careful planning at the specification stage can make the finished system easier to operate and maintain.
A full 20,000L water tank creates a static load of approximately 20 tonnes, while the largest tanks in this category can reach almost 50 tonnes when filled. A smooth, level and professionally engineered reinforced concrete base is therefore essential. The foundation should extend beyond the tank footprint and be designed for the total installed load.
You can compare smaller bulk-storage options in our 10,000 to 19,999 litre water tanks or explore our wider collection of water tanks. Our team can also help you assess capacity, fittings and site requirements before choosing the right tank for your project.
