New Storage Cistern

All storage cisterns in use these days are now made of ultra-light plastic so if you are going to install one yourself it is essential to make sure that the base of the new cistern is completely supported. If not, this will cause the plastic to stretch and eventually break at the unsupported point. Older galvanized tanks did not require this kind of full support.

Note: The old metal cisterns are usually left in the roof space because removing them requires extensive work.


Power Flush London based plumbers are trained to remove and replace this item. There are occasions where older asbestos ones are encountered, which are alright while in use, but when pass their usefulness it is essential that they are disposed of safely.

Do not cut this material, as this will produce a dust which is extremely dangerous when inhaled, even a minute particle can be hazardous to your health. The new replacement cistern should have a minimum capacity of 100ltrs if it is to serve only a system of cold or a system of hot water. However, this volume needs be at least 200ltrs or better still 250ltrs if it is to serve both cold and hot supplies. In order to provide the best pressure possible at the outlet points, such as showers and taps, you should locate the cistern as high as possible, so you may need to construct a supporting frame. This should be made of sufficiently strong timbers and breasts so it can support the weight of the cistern when it is full of water. The weight of water is quite substantial for example 1ltr of water weighs 1kg, therefore, 250ltrs of water would weigh 250kg which is equal to a quarter of at ton. Power Flushing London professionals are aware of this. It is essential that no jointing pastes or compounds are used to make the connections to the unit as these will have an adverse affect on the plastic walls of the unit, breaking it down and reducing its lifespan quite dramatically. The connections are made with what are referred to as tank connectors. They are passed through a hole made in the unit, with a plastic washer included, and when the fitting that is tightened it clamps tightly to the system wall.
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