I am adding one branch with two sub-branches to my gas line to supply a fireplace and a range stove.
I am testing the branch for leaks. I have a cap on one side of the branch, a valve shut off at the fire place, and placed a gauge at the stove output to measure pressure drop. All joints have been generously spread with gas sealant.
- I started the test early afternoon for 4 hours.
- Pressure at 5psi with my nail gun compressor and a 15psi gauge on the gas line.
- Dropped 1/10th of 1 psi in about 4hours (ie 0.1 psi).
- Temperature and outdoor pressure were stable.
- I cannot find any leaks on the branch and two sub-branches.
- Does gas pressure hold over time or does it lose pressure? (I am thinking of a balloon that loses pressure over time).
- Is it possible to lose pressure without leaks? If so why? (I have thought about climate change i.e. outside temperature and pressure)
- For leaks, I am using a liquid leak detector found at my local supplier. What better techniques to use to detect small leaks? (I tried soap and water also)
- Are small leaks ok?