Got the dreaded red tag when my gas lines wouldn't keep pressure, meaning there was a leak somewhere in the house. De Marco showed up first thing the next morning, confirmed that a leak existed somewhere, and after a few holes in the walls showed that my old house was full of old gas lines running in all directions. The tech then pointed out that it would be much easier to just add in a new line along the side of the house (where all the gas appliances were) and connect the appliances into that. It was done in a single day, looks really neat and professional, and was done for a quite reasonable price. And I should never have to worry about my gas lines again.