Monthly Archives: October 2015

Part 1 ball valve

A Part 1 ball valve or Portsmouth ball valve is a ball valve made to British Standard specification 1212, Part 1. It consists of a piston inside a brass housing, with a float arm secured to the valve via a split pin. Inside … Continue reading

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Overflow

An overflow is an important part of a cistern, and serves two purposes in the event of a fault: to take away excess water in order to prevent structural damage to a property, and to indicate to the homeowner that there is … Continue reading

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Ball valve

A ball valve or float valve, or less commonly, a ballcock, is a valve which controls the flow of water into a cistern via a plastic or metal float on the surface of the water. When water is drawn out of the cistern, the … Continue reading

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Ball valve repair kit

A ball valve repair kit is a repair kit which contains multiple types of spare parts for ball valves. A kit will typically include split pins, high and low pressure valve seatings, washers for Part 1 ball valves, and diaphragms for … Continue reading

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Essex flange

An Essex flange is a fitting on a hot water cylinder which prevents a device, such as a shower pump, from being damaged by air. It does this by drawing off water from the side of the cylinder. When water in the … Continue reading

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Surrey flange

A Surrey flange is a fitting on a hot water cylinder which prevents a device, such as a shower pump, from being damaged by air. It does this by drawing off water via a tube which dips down into the … 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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Stopcock

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, although in some homes … Continue reading

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Rising main

The rising main is a pipe in the home which delivers fresh mains water to the highest part of the plumbing system, most likely the cold water storage cistern in the loft. It will also supply the feed and expansion cistern, if there is one … Continue reading

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