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 has been installed in a sub-optimal location on the system The pump has been installed … Read more


A stopcock, or stop valve or stop tap, is an inline valve which controls the water supply to a property. It is usually located on or near the rising main, and usually under the kitchen sink. However, in some homes it may be located in a pantry or hallway. In addition to an internal stopcock, … Read more

Rising main

The rising main is a pipe in the home which delivers fresh mains water to the highest part of the plumbing system. This is usually the cold water storage cistern or the feed and expansion cistern. Both cisterns are usually located in the loft. Rising main overview Water for a property comes from the mains … Read more

Cold water storage cistern: what is it & how does it work?

The cold water storage cistern, often referred to as the cold water tank, is an important part of a gravity-fed domestic water system. It supplies cold water to the hot water cylinder, and to potentially every cold water outlet in the home, except the kitchen and outside taps. It is usually made out of plastic, although … Read more

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