For pressure testing and stopping all pipework from 50 mm (2") upwards. To complete the Pipestoppers range of nylon and alumimium expanding plugs we offer all sizes of steel expanding plugs. These are provided in sizes from 2", for more arduous duties such as long immersion in water and higher temperature.The plugs are merely inserted into the pipe and the wings tightened to force the top and bottom plates together, thereby expanding the rubber ring to seal tightly in the pipe. They are manufactured with > 1 / > 2 ", 1", 2" outlets as shown in the chart overleaf.The standard seals are made from natural rubber and special rubber seals are available for chemical applications where greater resistance is required.All plugs conform to British Standards BS 8005 for low pressure testing and sealing of pipes. >