Which shut-off valves should be open and which closed?
Answer: Emergency line valve - closed; Service line valve - closed; Shut-off valves to trailers and dolly(ies) - open
Answer: Emergency line valve - closed; Service line valve - closed; Shut-off valves to trailers and dolly(ies) - open
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.