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2. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   Backflow means the undesirable reversal of flow of a liquid, gas, or suspended solid into the potable water supply; a backflow preventer is designed to keep this from happening. Points at which a potable water system connects with a non-potable water system are called cross connections.

3. Portable water tank - Wikipedia

   en.wikipedia.org/wiki/Portable_water_tank

   A portable water tank is a temporary collapsible tank designed for the reserve storage of water in firefighting, emergency relief, and military applications. These tanks can be either supported or unsupported. The supported tanks have a steel or aluminum frame and range in size from 600 to 5,000 US gallons (500 to 4,160 imp gal; 2,300 to 18,900 ...

4. Cistern - Wikipedia

   en.wikipedia.org/wiki/Cistern

   Portuguese cistern (Mazagan), El Jadida, Morocco (1514) The difference between a cistern and a well is in the source of the water: a cistern collects fresh water where a well draws from groundwater. A cistern (from Middle English cisterne ; from Latin cisterna , from cista 'box'; from Ancient Greek κίστη ( kístē ) 'basket' [ 1 ] ) is a ...

5. Water tank - Wikipedia

   en.wikipedia.org/wiki/Water_tank

   An elevated water tank, also known as a water tower, will create a pressure at the ground-level outlet of 1 kPa per 10.2 centimetres (4.0 in) or 1 psi per 2.31 feet (0.70 m) of elevation. Thus a tank elevated to 20 metres creates about 200 kPa and a tank elevated to 70 feet creates about 30 psi of discharge pressure, sufficient for most ...

6. Flush toilet - Wikipedia

   en.wikipedia.org/wiki/Flush_toilet

   Flush tanks or cisterns usually incorporate a mechanism to release water from the tank and an automatic valve to allow the cistern to be refilled automatically. This system is suitable for locations plumbed with 12.7 or 9.5 mm ( 1 ⁄ 2 or 3 ⁄ 8 inch) water pipes which cannot supply water quickly enough to flush the toilet; the tank is needed ...

7. How better water systems can help a city survive the next ...

   www.aol.com/news/better-water-systems-help-city...

   To limit heat damage to those parts, pipes should be buried 3 feet underground, shrubs and buildings should be set back from the meter box, and the box itself should have a metal or concrete cover.