Patent ID: 7004203

Claim:
A heating and/or sanitation pipe comprising: an inner pipe ( 12 ) of plastic material having an exterior substantially right-cylindrical surface, a corrugated metal pipe ( 14 ) having an internal corrugated surface surrounding the substantially right-cylindrical exterior surface of the inner pipe ( 12 ) at a radial distance (r) defining a space between said surfaces, a compressible material ( 16 ) between said surfaces substantially entirely filling said space and fixing the inner pipe ( 12 ) inside the corrugated pipe ( 14 ), the compressible material ( 16 ) being detachable from the right-cylindrical exterior surface of the inner pipe ( 12 ) for exposing a connecting end of said inner pipe ( 12 ), an insulating layer ( 18 ) surrounding the metal corrugated pipe ( 14 ), and an outer covering ( 20 ) surrounding the insulating layer ( 18 ).