Short test pipe sealing cushion with bypass for shutting off and testing pipes during leak tests in accordance with EN 1610 using air/water or DWA-A 139, as well as oil and petrol separator tests in accordance with DIN 1999. The test sealing cushion has a bypass (open passage) into the shut-off area for connecting leak testing equipment. In addition, a pipe sealing cushion (type HU) is required to shut off the pipeline on the other side. - Flexible, lightweight design especially for house connections - With bypass for connecting leak testing equipment - Compressed air quick-release coupling NW 5 for filling - Compressed air coupling inside (in the test chamber) for connecting a push rod - Suitable for pipe inner diameters of 100-200 mm - Operating pressure 2.5 bar - Made of natural rubber with fabric insert - Total length 610 mm - Bypass connection Geka