Horobin’s steel test plugs with pneumatic seals offer multiple compression points around the perimeter of the plug, hence enabling the seal to expand in localised areas thus providing strength where it matters –at the compression point. These steel test plugs with pneumatic seals are fitted with handle bars, to make it easier to locate the plug in the pipe and can be supplied with twin outlets, the lower outlet allows for complete emptying of water before plug removal. The steel components are painted against corrosion and these test plugs can be supplied with chemical resistant seals. "double seal" plugs are supplied as standard in the Horobin’s steel test plugs with pneumatic seals series.