This chapter applies to all replacements of existing water service pipes as well as to new pipes. The Public Works Director shall make such rules, not in conflict with the provisions of this chapter, as may be needed for the detailed operation of the water system, subject to the approval of the Council. In the event of an emergency, the Director may make temporary rules for the protection of the system until due consideration by the Council may be had.
(Code of Iowa, Sec. 372.13[4])