Author Archives: DIYPlumbing

Polytank feed and expansion tank (4 gallon/18 litre)

The Polytank feed and expansion tank is a feed and expansion tank produced by Polytank Group Ltd, the British manufacturer of water tanks and cisterns. As the name implies, the tank is designed to be used as a feed and expansion … Continue reading

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Surestop stopcock

A Surestop stopcock is a stopcock produced by Surestop Ltd, a UK company which specialises in making easy to use stopcocks that are designed to prevent water damage to properties. Unlike traditional brass-handle stopcocks which may leak or jam, Surestop … Continue reading

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Why is there hot water coming from the cold taps?

Hot water coming from the cold taps – it may seem bizarre, but it can and does happen. On some occasions it is due to a hopeless plumber – this author once encountered a toilet which had been plumbed into … Continue reading

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How to isolate a toilet cistern – overflow or maintenance

Need to isolate a toilet cistern? Whether your loo is overflowing and the ball valve won’t shut off, or you turn to isolate the cistern for repair or maintenance, this guide has got you covered. Turn off the isolation valve … Continue reading

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Part 1 and Part 2 ball valves: what’s the difference?

What is the difference between a Part 1 and a Part 2 ball valve? These brass fittings are some of the most common types of ball valves found in British homes. They are typically found in loft cisterns, such as the cold water storage … Continue reading

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Tank bung

A tank bung is a bung used for blocking a cistern outlet, such as the outlets on a cold water storage cistern. Typically available in 15 mm, 22 mm, and 28 mm sizes, a tank bung consists of a plug made out … Continue reading

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Croydon ball valve

A Croydon ball valve is a ball valve which consists of a piston inside a brass housing, with a float arm secured to the valve via a brass split pin. On the end of the float arm is a plastic … Continue reading

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Open a drain cock: guide & tips

Need to open a drain cock? Whether you’re draining a hot water cylinder or a radiator, here are a few handy tips which may make the process a little bit easier. How to open a drain cock Ensure the discharge … Continue reading

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Drain the hot water cylinder: how-to guide

Need to drain the hot water cylinder? Whether you need to fit a new immersion heater or replace the cylinder altogether, it’s not a difficult task. However, unlike draining a cold water storage cistern, it cannot be done as easily … Continue reading

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Part 3 ball valve

Check Part 3 ball valve prices at B&Q Side entry Part 3 ball valve Bottom entry Part 3 ball valve A Part 3 ball valve or diaphragm ball valve is a ball valve made to British Standard specification 1212, Part 3. It consists … Continue reading

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