1. (a) In domestic installations no liquid gas shall be led into buildings. All pressure reducing devices shall be installed outside of buildings except in the case of a vaporizer house.
2. (b) The vaporizer shall be located outside of buildings, except those buildings devoted exclusively to gas manufacturing and distribution operations but may be located in a house or shed of fire resistive construction, well ventilated from points near the floor and roof.
3. (c) Vaporizers having a liquid capacity of one quart or less designed primarily for the purpose of domestic service employing artificial heat for vaporization and with vaporizer chamber integral may be installed in separate house or building used exclusively for this purpose or may be installed under a canopy type of protection. Units of this nature shall be so located that they will not be subject to tampering or mechanical injury.
4. (d) The device that supplies the necessary artificial heat for producing the steam, hot water, or other heating medium shall be located in a separate compartment or room, which shall be separated from compartments or rooms containing liquefied petroleum gas vaporizers, pumps, or central gas mixing devices, by the substantially vapor-tight fire wall.
5. (e) If such house or shed is a lean-to or a building addition it shall be separated therefrom by a substantially vapor-tight fire wall.
6. (f) No gas in the liquid phase shall be piped into any building for fuel purposes other than those which are devoted exclusively to gas manufacturing or distribution operations of those used principally to house internal combustion engines.
7. (g) Gas from the vaporizer or storage tank, if it is taken direct from the storage container in the gaseous phase, shall pass through a suitable regulator before entering the meter or the mixing device.
8. (h) In the case of vaporizers employing artificial heat, at or near discharge of vaporizer, a relief valve shall be provided having an effective discharge complying with §9.203(d) of this title (relating to Direct Gas-Fired Vaporizers).

9. (i) Each vaporizer utilizing artificial heat shall be permanently marked as follows.

   1. (1) With a marking signifying compliance with the rules of the Code covering specifications to which vaporizer is constructed.
   2. (2) With the working pressure in pounds per square inch gauge for which it is designed.
   3. (3) Outside and inside heat exchange surface area.
   4. (4) The name and address of the manufacturer, and manufacturer's serial number.
10. (j) Artificially heated vaporizers shall be provided with suitable automatic means to prevent liquid passing from the vaporizer to the gas discharge piping.

Source Note:The provisions of this §9.201 adopted to be effective January 1, 1976; amended to be effective June 1, 1989, 14 TexReg 1927.