The corporation commission for the state of Kansas is hereby empowered to establish districts within any city having a population of 500 or more where gas is distributed under any such franchise, and to require and compel the installation of regulators, pressure gauges, and other devices for determining the pressure of such gas and recording the same within such districts. The commission shall fix a standard pressure for efficient service and the price to be paid by the consumer based thereon, and shall also formulate and prescribe a method or methods for computing the amounts to be paid for gas by domestic consumers when the pressure is insufficient, based upon the standard of pressure for efficient service, and to make and prescribe and enforce such reasonable rules and regulations as may be necessary to enforce and carry out the provisions of this act.