Expandable test plugs for purging and general pipe blocking Pipe stoppers, or drain plugs as they are sometimes known, are used to temporarily seal the end of a pipe or opening for many different testing applications. Pipe stoppers are mainly used to seal off water, gases and foreign objects in newly laid pipes, or pipework systems that are under repair.
Nylon plugs are the standard ‘Drain Plugs’ for testing leak tightness of foul water lines at the time of installation. Furthermore, the range of sizes make these plugs ideal for several other applications in the water and gas industries as well as applications in all other industries where pipes are used or where there are holes to be blocked.