Aquarista is the leader in Greywater garden irrigation and Rainwater Harvesting systems in South Africa.

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Buying a Water Tank

Water TanksPositioning of Water Tanks.

One of the more common problems of rainwater tanks is their apparent obtrusiveness.  The size of the typical tank makes it impractical for them to be place close to the home. The typical perception, despite their usefulness, is that they can be ugly. To overcome this, the leading water tank manufactures produce tanks in a variety of shapes and colours.
The beauty of a rainwater harvesting system is that the water tanks no longer needs to be positioned where they traditionally have been placed, under the eve of the roof.  Water tanks may now be “hidden” anywhere on a property as long as the rain water tank is below the height of the gutter.

Underground water tanks may also be used for the retention of Rainwater, however conventional rain water ranks are not designed to be installed underground and backfilled with soil. If this were to be done they will collapse or they may pop out of the ground if empty. Special underground tanks are built, but are more expensive.

Water tanks and pumped irrigation systems

One way to use rainwater is to pump the harvested water to an irrigation system. Water tanks can be coupled to existing irrigation system, replacing the municipal water feed. When necessary a municipal water feed can automatically switch on if the tanks run dry.

Pumping water from tanks into the home for showers, baths, and flushing toilets.

The most cost effective way of using rainwater is to pump the water back into the home and use it for shower, baths, and flushing toilets. With the right kind of filtration system this water is safe to use inside the home.

What size water tank do I need (Tank capacity)?

Several factors should to taken into account when calculation the size of your water tank. These include where applicable:

The amount of water used for irrigation. (draw down)

The size of the irrigation system.

The size of the irrigation pump.

The flow rate (supply rate) of the wellpoint or borehole.

The number of people in the home.

The size of the roof.

The type of roof (Metal / Tile).

The space available for water tanks.

A water tank the regularly overfills indicated that there is either too little storage or that their is too little water use. While a water tank that never fills means that there is too much storage capacity.