(1) All sewer-pipes shall be centred and joined concentrically with the invert on true line.

(2) If sewers are constructed of cast-iron socketed pipes, the joint shall be secured to a depth of at least half the socket depth with molten lead, run in one pouring, or with lead wool, properly caulked.

(3) If sewers are constructed of cast-iron flanged pipes, the joints shall be securely bolted together with insertion material, to the approval of the local authority, placed between the faces of the flanges.

(4) If sewers are constructed of glazed-earthenware pipes or other non-metallic pipes, the joints shall be made to the manufacturer’s specification and to the approval of the local authority.