NGf L CYMRU GCa D PLUMBING MATERIALS PIPE

NGf. L CYMRU GCa. D PLUMBING MATERIALS, PIPE BENDING AND PRESSURE TESTING www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes are used to connect various plumbing elements together, to form a plumbing system. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes are used in the supply of gas, drinking water, water in heating systems, and in drainage. Pipes can be made from plastic, copper, stainless steel, or cast iron. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes are colour coded to show what they carry. Underground gas pipes are yellow: inside a building, gas governors are also painted yellow. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Water supply pipes can be blue in colour. Alternatively, copper pipes can be used for water supplies, but lead pipes cannot be used. The above picture shows a www. ngfl-cymru. org. uk temporary water supply during a site redevelopment.

PLUMBING MATERIALS Pipes for foul drains are coloured brown. NGf. L CYMRU GCa. D www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes carrying water to heat or cool a building, or that supply hot water, are heavily insulated. This reduces heat loss and energy costs. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Connections between pipes can be made with compression fittings (shown below), or by soldering pipes together, as follows: - www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Wire wool is used to clean the ends of connectors (shown left) before pipes are soldered together. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Flux is applied to prevent oxidisation of the surfaces. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipe work is heated using a blow lamp. Solder is melted to a liquid with the blow lamp, and is used to weld connectors and pipes together. Once cooled, the solder returns to a solid, forming a watertight seal. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes are fixed in place using special brackets. Once pipes are joined, water can be run through them to pressure test the pipework. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Lead sheet is used to make flashings around chimneys and flues. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Components are joined together using oxyacetylene torch welding. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D Pipes are bent to shape using pipe bending tools. The series of images shown next show pipe being bent. www. ngfl-cymru. org. uk

PLUMBING MATERIALS NGf. L CYMRU GCa. D www. ngfl-cymru. org. uk

PLUMBING MATERIALS Pipework is earth bonded. NGf. L CYMRU GCa. D www. ngfl-cymru. org. uk