For those properties with an older water system there may be a hot and/or cold water tank located in the loft or another high point in the building, but it’s important not to ignore them.
These tanks may supply a hot water cylinder, but also supply water directly to toilets, urinals and cold water taps. The problem with these tanks is that they can have a build up of sludge, develop scum, sometimes corrode, leak and also attract bird and insects.
When a tank is in poor condition it can cause serious health issues. One of the most dangerous is legionella bacteria, which colonises stagnant warm water where there are nutrients from scale. The bacteria can cause Legionnaires’ disease when tiny droplets are inhaled, for example when water splashes in a sink.
There are requirements for water installations, however; older tanks may not meet today’s expectations.
Rules are described in the Water Supply (Water Fittings) Regulations 1999, which plumbers must follow.
Tips for checking and maintaining your tanks:
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