Posted on: 2014-05-04 17:51:59<< Older post Newer post >>Below is some brief information regarding the metric and imperial measurements for the pipework that plumbers use:The copper and stainless steel pipes that are used in plumbing are now made in metric sizes, whereas the pipework that is already installed in most older houses will have been made to imperial measurements.
Waterloo Plumbers know the different sizes and types of pipes. If you compare the equivalent dimensions 15 mm-1/2in, 22 mm-3/4in, 28 mm-1in, the difference seems obvious, but metric pipe is measured externally while imperial pipe is measured internally. In fact, the difference is very small, but enough to cause some problems when joining one type of pipe to the other. When making soldered joints, an exact fit is essential. Imperial to metric adaptors are necessary when joining 22mm pipe to its imperial equivalent, and although not essential, adaptors are convenient when you are working with 28mm pipes or with thick walled 1/2in pipes. A
Waterloo Plumber is trained to know what sizes will go together. Adaptors are not required when using compression fittings, when you are connecting 22mm to 3/4in plumbing slip and imperial olive onto the 3/4in pipe. Typically, 15mm (1/2in) pipe is used for the supply to basins, kitchen sinks, washing machines, some showers, and radiator flow and returns. However, 22mm (3/4in) pipes are used to supply baths, high output showers, hot water cylinders and main central heating circuits, and 28mm (1in) pipe for larger heating installations.
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