Cold Water Tanks: Everything You Need to Know

When it comes to the supply of water within most commercial and larger domestic properties, the cold water tank is an essential part of the system. If you’re wondering why you need a cold water tank and what exactly it does, read on to find out more.

Cold Water Tank

What is a Cold Water Tank? 

When taking a shower have you ever experienced the temperature or water pressure change, typically resulting in the water becoming hot or cold and the amount of water reducing? This is due to the drop in available water when a washing machine or dishwasher is in use for example, or someone uses water from a tap. The supply from the mains water supply cannot meet the simultaneous demand of the various items in use. Imagine this scaled up in a building with 60 taps, 10 showers or 20 washrooms. Buildings such as educational facilities including schools and universities, offices and other building where larger numbers of people live or work. If 20 taps were opened at one time the mains water supply would have little chance of keeping up with the demand.

So what is the solution? A cold water storage tank is used for the storage of large amounts of water from which the building is supplied with water. The tank is then replenished by the mains water supply at a steadier rate.

What Size of Cold Water Tank Do I Need? 

The size you’ll need depends on a variety of factors. The tank is sizes based on the demand within the building, calculations considering the number or washrooms, basins, showers and other facilities which use water. The number of people within the building also forms part of the calculation.

Additional factors include the space available and configuration of that space where the tank is to be located within the building.

Water storage tanks are available in a variety of configurations, both square and rectangular; Purewater can also manufacture bespoke tanks designed specifically to fit within the exact space available. The standard range of tanks begins at 90 litres up to and including 16,000 litres for one piece tanks. The maximum tank size for the Purewater range of sectional water tanks (which are delivered as flat-pack units and assembled on site) is 1,000,000 litres.

Historically, water storage tanks have been manufactured from a number of materials including wood, lead (imagine how healthy these tanks were), cast iron and galvanised steel. Since the 1970s, cold water tanks have been made from fibreglass (GRP). The use of GRP ensures that water is stored in most sterile manner possible, reducing the possibility of deterioration and contamination.

Where is the Cold Water Tank in my Building?

There are a variety of places where a cold water storage tank can be located within a property. In some cases, it can be found within roof space or the attic of a property, known as a gravity feed system, these are gradually being replaced with tanks which are at ground or basement level, the water then being supplied to the building with use of a pump set, known as a pressurised system.

Do Cold Water Tanks Become Contaminated? 

Water hygiene is extremely important. Contaminated water systems contribute and are often the cause of serious health issues including legionnaire’s disease which is caused by growth of legionella bacteria in water.

Water storage tanks are subject to stringent legislation requiring them to be inspected and cleaned, Purewater can also help with this, employing a team of engineers who can inspect and clean your water storage tanks.

From Installation to life-long maintenance Purewater can help.

 See our full range of new cold water storage tanks online or give us a call on 0121 323 4000

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