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ASME A112.4.2-2015 pdf – Personal hygiene devices for water closets
ASME A112.4.2-2015 pdf – Personal hygiene devices for water closets. 4.2.2 When used, atmospheric vacuum breakers shall (a) comply with Clause 5.5.1; and (b) be installed with the (i) critical level located not less than 25 mm (1 in) above...