Cold water tanks supply water to your hot water cylinder

A cold water tank or technically speaking, a cold water storage cistern can also be referred to as an expansion tank or loft tank. It provides cold water to a hot water tank, central heating system, toilet cistern and the cold water taps within a property.  ​

Cold water tanks for your central heating system

Depending on the type of boiler you have fitted in your home, it is not always necessary to have one.

For example, if you have a combi boiler, you will not need to have a cold-water tank installed. Cold water tanks are usually found in the loft (hence being also known as loft tanks!) or in the ceilings of bathrooms, i.e. close to where the toilet can be found.

If you are not sure whether a tap delivers water directly from your mains or is being delivered via a cold water tank- we can advise you. Alternatively try placing a thumb over the tap outlet to "feel" the water pressure. Mains connected taps are usually of a higher pressure than stored water taps.

So, if it’s time to replace your old tank because it’s in need of repair, or you wish to upgrade it to a polythene cistern (which is collapsible, therefore allowing it to gain easy entry in a loft space!) we will be happy to help. ​​
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All new cisterns we fit comply with the following legal requirements:
  • there should be connectors and valves to prevent light and insects entering the tank, which ensures that the water remains clean
  • there should be a screened overflow pipe, to prevent insects from entering the tank
  • there should be a reinforcing plate to stiffen the cistern wall around the float valve
  • there should be an insulating jacket to prevent freezing during winter and to help keep cool in the summer

Get in touch to book an appointment for one of our professional Arco team engineers to assess how they can be of service.