Pipe-sealing wall box

摘要

The sealing wall-box comprises a lininga tube enclosing and clear of the pipe passing through and with external protrusions by which it is grouted in the wall, together with a seal between tube and pipe. The tube (3) has a screwed portion (8), by which it engages with a further coaxial tube section (5). The latter also encloses and is clear of the pipe (1) passing through the wall (2), and is likewise grouted into the latter by its external surface.