A. Installation work on Customer's Branches shall be in accordance with the best journeyman practice and these Rules and Regulations and ordinances of the City.
B. The Customer's Branch shall be without joints to a point one foot (1') outside the property line using copper tubing. The pipe shall have a constant internal diameter from the tap through and including the locking ball valve. The pipe shall have a full waterway throughout, equal to the inside diameter of the pipe. Pipe ends shall be reamed to remove any obstruction to the flow of water. Where joints are needed, they shall be of the flare type only. Any exception requires the written approval from the Division of Water Distribution.
C. Where two incompatible metals are used in a service, a dielectric union between said metals shall be required.