The ends of all house drains not to be at once connected with the interior drainage, or other sanitary fixtures, shall be securely closed with vitrified discs or with brick masonry, so as to be rendered absolutely impervious to the surrounding material in which the pipes are imbedded.
All connections between the main sewers and the slaughter houses, lard rendering establishments, butcher shops, packing houses, hotels, restaurants, manufacturing establishments, etc. shall be through intervening receiving basins, built in brick masonry, and whose number, dimensions and form shall be prescribed by the Engineer. Whenever a drain pipe is connected with the temporary receiving basin for draining excavations made for the foundations of buildings, or for any other purpose, the open ends of all such pipes shall be covered with some form of screen, and the drain layer will be held strictly responsible for all expense that may be incurred for removing all sand, gravel or earth from out the main sewers which may have found their way therein by reason of the negligence of himself or his employes.