Section 4 Means of conformance — Gas pressure regulators4.1 Suitability of pressure regulatorsIn Australia, cylinder regulators shall be certified to AS 4621 or ANSI UL 144 and provide over-pressureprotection to ensure the pressure downstream of the regulator will not exceed 14 kPa.In New Zealand, cylinder regulators and automatic changeover valves are required by the Health and Safety at Work Hazardous Substances Regulations 2017 to be of a registered type.4.2 Outlet pressureThe outlet pressure shall be set to 3.0 kPa nominally to ensure correct simultaneous operation of all gas appliances.4.3 Mounting and support of regulatorGas pressure regulators shall —(a) be mounted in a location that will achieve ready dispersion of discharged gas;(b) be mounted —(i) directly to the structure of the caravan or boat; or(ii) in New Zealand, directly on the cylinder valve, provided this does not unduly stress the cylinder valve.(c) be located so as not to obstruct the removal or replacement of cylinders;(d) be located to permit drainage of any liquid back into the cylinder;NOTE See Figure G.1 in Appendix G for an example.(e) if located externally, have the vent positioned to avoid blockage by contaminants; and(f) be positioned in a safe location, accessible for maintenance and adjustment.