I was looking for a hose fitting closer to the front of my house when I noticed this valve with what appears to be threaded for a hose fitting right off my water main next to the water meter (Blue circled in the picture below).
Can I just screw my garden hose into it like normal and use it without blowing something up because of pressure or something?
I am not sure if attaching a garden hose so close to the water main will mean it's over-pressurized or something. I don't know about plumbing at all.
As a side note; why are there three water main valves (yellow valves) all so close together (2 right away at the wall and one more after the water meter)?
If I ever need to turn off my water main does it matter which of the 3 valves I use?
The water main comes into the house from the street in the wall in the upper right.