Told the gas company to come take the 250 # tank so I can use my own tanks, and when they took the tank they took a 3' piece of copper tubing that went from tank to the wall and I can't remember if it had a regulator mounted at the tank. My setup is a tankless Baxi burner making hot water and teed off to run a cooktop. There is a 3/8" tubing running out the house to a regulator mounted on the wall of the house then runs about a hundred feet under ground to the tank. I setup a hundred pounder hooked to the line where the other tank was and it works, but I'm worried that the regulator at the house is a secondary and there was a smaller primary at the tank. I vaguely remember there being one but not too sure. Can anyone tell me I don't want the setup to be unsafe, and every once in a while the unit shuts down and I have to reset it and that never happened before with the other tank.