sb. Plumbing. A widening-out of the end of a lead pipe into a broad thin flange. So Taft v. trans., to expand and turn outwards at a sharp angle the end of (a lead pipe) so as to form a wide edge or fastening flange.
1877. Hellyer, Plumber, i. 21. The soil-pipe can be ‘tafted’ at the end. Ibid., ii. 33. When the pipe is tafted back at right angles,… the lower pipe is liable to break away at the taft.
