Protection of the Environment Operations (Clean Air) Regulation 2022
109Pressure vacuum valves
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109 Pressure vacuum valves
109 Pressure vacuum valves
(1) A large tanker truck must have pressure vacuum valves fitted on the atmospheric vents of the delivery tank that are—
(a) set to be closed when the pressure in the tank is between 15kPa above, and 3kPa below, ambient pressure, and
(b) of a kind that may be fitted with a vent by-pass or pilot-bleed system if the maximum area for free venting is limited to 15mm2.
(2) Subsection (1) does not apply to an emergency vent fitted to the tank.
(3) The pressure vacuum valves must be maintained in an efficient condition.