VAPOR INTEGRITY TEST--Continued
Although an emergency valve leak does not constitute a
K stamp (indicating compliance with DOT 49CF180.407 (h))
failure if the leak is internal, proper emergency valve operator
function is required for safe operation.
Close emergency valve A (25) and monitor gage (30) on regulator assembly (12).
Wait 5 minutes to verify that pressure reading remains stable. If pressure drops more than 0.5 in.
wc on gage (30), go to step 10. If pressure remains at 17.5 to 18.5 in. wc, go to step 13.