Protective plug for drainage pipes

摘要

The protective plug for drain pipes is esp. for use during installation of sanitary appliances in new buildings, and during renovation works in old buildings. The plug (1) consists of a rotation symmetrical stud with several steps (1a,b,c), of different dias. The end of the smallest stepped section is closed. Each step pref. has the same wall thickness, and the transition areas (U) between the steps are inclined, or rounded.