Need plumbing advice on a gas line.

[Daniel Lee]

Hello. I am building a new house and the plumbers installed the gasline and the gauge drops down about 3/4 PSI a day. The company says that it only needs to hold 15 PSI for 15 minutes to pass inspection. (It does).

That doesn’t sit well with me that it drops slowly. But then I am a perfectionist and would like someone else’s opinion.

I understand the PSI fluctuates with outside temperature and I have only been able to stop by in the evenings. 

About what PSI is normal for it to remain throughout phase of construction? 

Is this acceptable? I don’t just mean to pass inspection. I want a solid gas line. Should I call out  another plumbing company?

Thanks.