(a) Regulators. (A device for reducing and controlling pressures between the service and house piping) (1) Any customer's service being supplied through a customer service pressure regulator shall be protected by a suitable safety device to prevent the development of pressures in excess of two pounds per square inch gauge.

1. (2) Provision shall be made for the venting of the diaphragms of service pressure regulators and pressure relief devices to the outside atmosphere. The vent shall be of a size no smaller than the connection provided by the manufacturer and so installed as to relieve the entire capacity of the relieving device. Such vent or vents shall terminate outside buildings, pits and confined spaces in rain-proof fittings and shall be installed with due regard to hazards to life and property by the venting of gas into the atmosphere.
2. (3) All service pressure regulators installed on the customer's premises shall be maintained in proper working order and shall be periodically inspected in place, preferably at the time of removal of the meter for periodic testing. The inspection shall consist of external examination of the regulator, its piping, seal, vent line and operating condition.

(b) Shutoffs.

1. (1) All services entering a building shall be provided with a shutoff inside of the building and ahead of the meter. Where a service pressure regulator is part of the metering installation, the shutoff shall be located upstream of the other gas service fittings within the building.
2. (2) A shutoff shall be installed at the curb or property line on all gas services supplying gas to a theater, church, school, factory or other building where large numbers of persons assemble and on all gas services where the inlet pressure to the service is in excess of two pounds per square inch gauge. In the case of an outside meter or regulator installation, subsection (c) of section 16-11-22 shall apply.
3. (3) Shutoffs may be either a cock or a valve and shall be accessible and maintained in proper working order.

(c) Installation of services.

1. (1) The gas company may furnish and install, but shall maintain free of charge, a gas service from the gas main adjacent to the customer's premises to the customer's property line or curb when in its judgment the cost of installation is reasonable and the use of gas is sufficient to warrant it.
2. (2) While the service connections from the property line to the customer's metering equipment shall ordinarily be installed at the expense of the customer and shall be maintained by the company, the company may furnish such service connections in whole or in part when, in its judgment, the cost of installation is reasonable and the use of gas is sufficient to warrant it.