Tag Archives: expansion pipe

Expansion pipe

The expansion pipe or vent pipe is a pipe associated with a cold water storage cistern or a feed and expansion cistern. Its purpose is to accommodate the expansion of water when it is heated, and to allow any excess water to … Continue reading

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Hot water in the cold water tank – why?

While the cold water cistern is designed to accommodate modest levels of hot water entering via the expansion pipe, things can go wrong, and in some cases, there may be hot water in the cold water tank. In such circumstances, the … Continue reading

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Pumping over

Pumping over refers to a symptom of an improperly configured central heating system in which water is discharged into the feed and expansion cistern via the expansion pipe while the pump is running. The cause is usually either: The pump … Continue reading

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