Based on GIS/E4 Specification but covering a wide size range and pressures. Bags can be attached to standpipes which have rubber
bungs that slide down the pipe to seal the hole drilled in the pipe. These are most commonly used with lighter‐than air gases since some
gas will escape when the bag is inserted into the main through the hole drilled in the top of the pipe.
Standard Size range 2″(50mm) to 12″(300mm) large bags available on request.