Somewhere in our laundry/utility room there is a minute gas leak. If you close the door for a couple days the odor is noticeable, with the door open DW can smell it, I can't. This has been the case since the piping was installed. It passed the required pressure test for inspection.

I've been over every junction with soap solution and can't see any sign of a leak. The odor is so faint, I expect that the leak is very small (along with it having passed the pressure test). Between furnace, HW heater, gas dryer, and piping to the generator there are a _lot_ of joints.

Is there a more sophisticated leak detection system available?