Specification for the installation and maintenance of low pressure gas installation pipework of up to 35 mm (R114) on premises|Joints, Stainless steels, Pressure testing, Gas pipes, Gas supply, Ventilation, Plastics, Corrugated, Corrosion protection, 2nd family gases, Design, Steels, Design calculations, Pipes, Size, Pipe fittings, Valves, Installation, Pipework systems, Gas circuits, Buildings, Walls, Leak tests, Copper, Pipe supports, Fire safety, Underground, Corrosion, Dimensions, Malleable cast-iron, Domestic pipework systems, Floors, Safety measures, Fire safety in buildings, Pressure, Flow rates