Materials Used in Water Tanks

water tanksThere are several material options for water tank manufacturing. Plastic water tanks are among the best choices for most property owners. This is because they are inexpensive to purchase and maintain.

The manufacturing process primarily influences the properties of slimline water containers. The typical method used nowadays is rotational moulding, which involves heating a pre-measured polymer and rotating it within a hollow under low pressure until it completely cools. Here are the constituents of the rotational moulding process:


This is the base component of over 97% of plastic water tanks. There are different categories of polyethene: low, high and cross-linked. Polyethene is inexpensive, durable, and safe for storing drinking water.

Catalysts and Co-monomers

During rotational moulding, various co-monomers and catalysts are added to polyethene to support specific reactions. Butane, hexane and octane are the conventional materials used. Butane is affordable and has excellent mechanical properties, but hexane and octane are currently taking over since they have better features. These materials will not affect the safety of your water tank since they are entirely used up in the manufacturing process.


These are used to enhance the quality of polyethene based on its environment. The conventional additives used in rotational moulding include microbial and flame retardants. Though water tanks with these additives might cost more, the extra properties conferred by the additives improve the operation of your tank in different adverse environments.

The given materials are generally used in the production of rotationally moulded water tanks. Rotational moulding is economical, produces tanks with uniform wall thickness and easily makes complicated shapes. Hence, it is your best option for a durable plastic water tank.

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