Explanatory notes
… drainage pipes, of porous common pottery, fired at only a low temperature and roughly finished. (2) Other pipes, … fittings for connecting or branching (collars, flanges, elbows, T-pieces, clean out traps, etc.). The heading does … cover : (a) Tubular chimney-parts (e.g., chimney-pots, cowls, chimney liners and flue-blocks) ( heading 69.05 ). …