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The purpose of this leaflet is to explain to those who are still wary, just how to work with copper pipe perhaps to install central heating or purely to fit a new bath, sink or basin. The basic techniques are the same in all cases the only major differences being in the size of pipe you use to get water from one place to another and the fittings you use to make the connections. At the end of the leaflet you will find some of the precautions you will need to take to ensure that work you do continues to ensure that current Water Supply Byelaws are followed, especially to prevent back siphonage and possible contamination of the mains supply. Pipework to a hot water storage cylinder and bath taps will be in 22mm pipe, and to the basins, sinks, showers, and the W.C., in 15mm pipe. If there are several outlets in a run of pipe, the main pipework will be 22mm with 15mm offshoots where necessary. Diagram A shows a typical cold water supply pipe layout from a storage tank using the two different pipe sizes. FITTINGS Wickes sell different types of basic pipe connectors for 15 or 22mm pipe. Three of these types are suitable for the ‘occasional’ inexperienced plumber. The first is known as a compression fitting. This, as shown in Diagram B, consists of a brass union with brass coupling nuts at the outlets. A softer copper or brass ‘olive’ ring fits between each coupling nut and the union. Disadvantages are that compression fittings are bulky and relatively expensive. The second type of connector is called a solder ring fitting. This is a copper fitting as shown in Diagram C which has a ring of solder already built into a groove inside the outlets. To make a connection to pipe the solder has to be melted using a blowtorch. Solder ring fittings are considerably less bulky than compression fittings and are much cheaper. To a large extent these common fittings are being replaced by Servicing Valves which are much neater and, in many ways, more effective. The water supply to an appliance is cut off simply by using a screwdriver or penny coin to turn a screw on the body of the fitting which closes the valve. Diagram D shows the three types. Servicing valves should be used wherever there is likely to be a need to stop a water flow - for example on supply pipes to taps which may need washer changes or appliances which may need to be disconnected from the supply for servicing. Diagram E. MAKING A COMPRESSION JOINT, MAKING A SOLDER RING JOINT, Bending Pipes, Stop Valves.
Tags : cold water supply, bath taps, storage cylinder, copper pipe, pipe connectors, storage tank, compression fittings, pipe sizes, water storage, supply pipe, wickes, blowtorch, offshoots, leaflet, basins
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