5 Types of Rainwater Storage Tanks

Rainwater Storage Tank

A rainwater storage tank is a water storage tank that is used to store rainwater from rooftops through pipes. It decreases mains water use and also for economic reasons. Stored water might be used for watering gardens, agriculture, washing clothes, and also for several purposes of domestic usage.

Stored water may also use for drinking purposes however before using, ensure that the water is safe through filtration and ultraviolet sterilization. Before using this water, it’s better to perform laboratory tests to confirm that water is risk-free for health or not. Stored water is used for drinking purposes, where the water quality is really extremely unhealthy or perhaps very expensive.

Different Types of Rainwater Storage Tanks

The rainwater storage system is varied, so there is a variety of storage tanks available, different in size, shape as well as material. Rainwater tanks can be produced from a range of materials like reinforced cement concrete (RCC), polyethylene (PE), glass-reinforced plastic (GRP), and fiberglass. Storage tanks can be also made from pre-cast concrete. A rainwater tank can be overground or underground.



Concrete storage tanks are used for rainwater harvesting. These types of tanks are useful for storage tanks, concrete tanks can either be cast in situ or precast. They can be built over or underground. Concrete storage tanks are supposed long-lasting.

Underground concrete tanks are sensitive to cracking and leaking, particularly when in clay soil. Leakages can be effectively repaired, although the tank may require to be pumped out to make the repair. A variety of products that repair leakages in concrete tanks is now available in the market and are useful for drinkable usage. 



Metal tanks are a good choice as compare to concrete tanks as they are lightweight, less expensive, and simpler to install.
They are available in sizes that vary from small tanks of 150 gallons to medium-sized 2,500-gallon tanks. These tanks are easy to shift if required. Most tanks are corrugated galvanized steel dipped in hot zinc to improve corrosion resistance. These tanks must be lined with a food-grade liner, usually polyethylene, or glazed from the inside with epoxy paint. The paint or liner will extend the life of the metal. If being used for drinkable water must be approved by relating agencies for potability. These tanks are for above-ground use.



Polyethylene tanks used for rainwater storage are the most popular. These are very preferred due to their price and good quality. They differ significantly in size, shape, and color, and can be utilized over or underground. Polyethylene tanks are comparatively inexpensive, light-weight, and durable and are available in capacities from small 50 gallons to large 12,000-gallon tanks.

They are lighter in weight than other types of tanks.
These tanks are manufactured with nontransparent plastic and use color pigments. Black and dark-colored tanks absorb heat. Before buying a plastic tank make sure the best quality rainwater storage tank because there will grow algae in low-quality water tanks.



Bladder tanks used for rainwater storage are usually used if you just have a small place for a tank. It is made from a flexible membrane that tightens when water enters, these rainwater bladders can consume a lot of surface area. However, you will end up investing plenty more in the plumbing systems and accessories as your pipe from your roof will need to be much longer after that if you used a normal water storage tank.



Fiberglass tanks are better than steel and concrete. Fiberglass tanks are lightweight, reasonably priced, and long-lasting. They are built-in standard capacities from small 50 gallons to 20,000-gallon tanks and are available in both vertical cylinders and low-horizontal cylinders. The durability of fiberglass tanks has been thoroughly tested and proven to last for years and can be easily repaired.

Things consider before installing a rainwater storage tank

The material makes a huge difference. First of all, the purpose of the rainwater storage tank is much important. If it uses for drinking purposes there are more concerns to choose the right material. Concrete and metal water storage tanks are particularly dangerous as they can rust and corrode over time.

This means that the rust into pure rainwater causing it to become completely undrinkable. A plastic storage tank is the best choice for drinking purposes. The color of plastic rain harvesting tanks can affect the quality of water.