Historical
ANSI Z21.18a-2001
Gas Appliance Pressure Regulators (same as CSA 6.3a)
Details test and examination criteria for gas appliance pressure regulators for use with natural, manufactured and mixed gases, liquefied petroleum gases and LP gas-air mixtures. Such devices, either individual or in combination with other controls, are intended to control selected outlet gas pressures to individual gas appliances.
CSA America, Inc. [csa]