| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | pipe material | Germany | Often made of brass for heating pipes | 1 |
| 2 | pipe materials | Germany | Cast iron commonly used for sewage pipes | 1 |
| 3 | pipes | Germany | Pipes are commonly used for plumbing and sewage systems. | 1 |
| 4 | piping | Germany | Commonly used for indoor plumbing and heating systems | 1 |