This is the cherry on top, the valve.
The meter. I tried to shut off the valve at the upper right but it would not budge. I didn't force it, I think it's set to stay open with a setscrew at the three o'clock position on the valve body.
But I was able to shut it off upstream of the meter. I didn't bother to lock it out though.
A little explanation first. I tried to remove only the capfrom this tee here at the beginning of the installation process. But when I put a wrench on the cap, the whole nipple came out with the cap still on it. FINE.