Atmospherically controlled regulators shall be installed in such a manner that moisture cannot enter the regulator vent and accumulate above the diaphragm. Where the regulator vent may be obstructed because of snow or icing conditions, a shield, hood, or other device approved by the enforcement agency shall be provided to guard against closing the vent opening.
Cal. Code Regs. Tit. 25, § 1229
Note: Authority cited: Section 18300, Health and Safety Code. Reference: Section 18690, Health and Safety Code.