So I have a general question for plumbers located in Illinois I am looking to purchase a home in Warrenville IL. And the home that I am looking at has a gas cap in the laundry from and in the fire place but no shut off valves. There is a main shut off valve. I have talked to a few people with mixed responses does a capped gas line need a shut off valve? I would like to see the seller of the home get this work completed but need some information to go back to them and ask to have this completed before closing.