Came out for gas leak. Gave quote for air test and repair. Notified homeowner we can’t relight water heater as the vent is installed so incorrectly, it is a huge safety hazard to have it lit. Gave options to replace the water heater as there’s no way to make a gas water heater work in the crawlspace with a metal venting system. Homeowner declined service as I would not relight the water heater after we were done repairing the gas line.