All joints and connections shall be made gastight and watertight.
All joints in vitrified clay pipe, or between such pipe and metals, shall be made with approved hot-poured jointing material or other acceptable jointing material approved by the Superintendent.
Material for hot-poured joints shall not soften sufficiently to destroy the effectiveness of the joint when subjected to a temperature of 160 degrees Fahrenheit, nor be soluble in any of the wastes carried by the drainage system. The joint shall first be caulked tight with jute, hemp or similar approved material.