Hi, I am installing a new water heater. Everything is good to go but when I turned on the gas I smelt a little gas. I used a leak detector fluid but didn't see any bubbles. I didn't try starting the pilot. The valve end the flex hose is attached to has a flare fitting (see picture). I didn't put pipe dope on it. Was this correct? On the other end I only applied pipe dope to some of the threads. I read that no dope is recommended but plumber's do it anyway. I used a gas detection device and it went off at both of the fittings even though there were no bubbles. Do you have any advice on what I am doing wrong or how to proceed? Thanks so much!