(1) All cast iron sewer-pipes, traps and associated fittings shall be sound , neatly dressed castings which are dark grey on fracture and capable of being easily drilled, tapped and files.

(2) The pipes shall be true, smooth, cylindrical and straight, and their inner and outer surfaces shall be as nearly as practicable concentric.

(3) The pipes shall ring clearly when tested for soundness by being struck all over with a light hand hammer.

(4) All such pipes, traps and associated fittings shall be effectively protected against corrosion by being coated on both the inside and the outside with a suitable corrosion-resistant bitumen, tar or other approved compound.

(5) The thickness of such pipes, traps and associated fittings, and the mass, internal depth of socket and caulking space of pipes, shall be as set out in Table III