The red ones are for outdoor use, not hot water resistant. The gray ones are for indoor use, hot water resistant. The gray ones are made of polypropylene, the red ones of polyvinyl chloride. Gilded ones do not exist. Karsten
Theoretically, many still have sound-dampened versions in the program. However, this is less of an issue in single-family house construction. The gray one is also completely sufficient.
Theoretisch haben viele noch schallgefämpfte versionen im Programm. Allerdings ist das weniger ein Thema im Einfamilienhaus bau. Das graue reicht auch völlig.
Good morning
As soil pipes, especially through non-utility / technical rooms, it is already an issue.