Water Storage Tanks
Water storage tanks are available in many sizes to meet a variety of needs, including disaster preparedness and irrigation. They hold potable water on farms and at construction sites and are ideal for long-term storage in areas that experience frequent water shortages. Water storage tanks can be small enough to keep in a closet or large enough to supply an entire community.
Water Storage Tank Sizes
The average adult can use between 50 and 100 gallons of water per day. In a time of crisis, that recommended allotment drops to about 2-3 gallons per day. This is a bare minimum, but allows for efficient use of water stored in home tanks. Most home storage tanks range in size from 5-gallons to 55-gallons. Tanks can range in size from 5 gallons to 10,000 gallons for home and farm use.
Smaller tanks can fit in the bed of a pickup truck. Collapsible bladders are also sold for short-term or permanent use. Larger units require custom installation either above or below ground.
Water Storage Tank Construct
A series of PVC or polypropylene attachments, which include hoses, pumps, level indicators, and valves, transfer water from the tank to the designated source. Some tanks have expansion connections that allow linking to a series of other tanks as needed.
Water storage tanks may be made of:
- Galvanized steel with an anti-corrosive lining
- Resin composites
- Food-grade polyethylene.
Other lining elements used in larger storage tanks include:
- Enameled porcelain
- Zinc galvanization.
Bear in mind that intended use and location will determine the type of tank composition, as each has advantages and drawbacks, such as temperature parameters.
Rural areas or homes that lie outside city limits may depend on water storage tanks that have electrically-powered pumps. During outages, residents rely on backup, smaller storage containers. These tanks should be dark in color if water is exposed to sunlight, as UV light encourages algae growth. However, newer polyurethane products are sunlight resistant.
The length of time that a home storage tank can be effective depends on the water: hardness, softness, and pH balance. The water can be stored almost indefinitely if kept in a dark place. However, it is wise to rotate water every few months, allow the tank to dry, and replace it with a fresh supply.
Water Storage Tanks: Other Uses
In addition to holding drinking water, some storage tanks are designed specifically to collect rainwater, which has many uses in landscaping, can provide water for farm animals, and are kept as backup fire prevention in rural areas.
Water Storage Tank Requirements
Water storage tanks must meet certain requirements to maintain liquids in a bacteria-free environment. FDA approval is required for drinking water storage containers, regardless of their construction. The largest industrial tanks must not only be made of FDA- and USDA-approved material but must also adhere to standards set by DOT, A.S.T.M., and the U.S. Department of Interior.