It looks like you’re right for at least a couple of those examples. That’s cool, I learned something today. So what’s up with the bolts at the base? I guess the valve part slides into the main pipe so they can easily replace it when needed?
I’d imagine it also makes repairs easier. Say a car hits a fire hydrant. It’s really only going to damage the part above ground. Having that part bolted on means you don’t have to dig out and replace the entire thing.
It looks like you’re right for at least a couple of those examples. That’s cool, I learned something today. So what’s up with the bolts at the base? I guess the valve part slides into the main pipe so they can easily replace it when needed?
They are universal. You ca. either have the valve right there in fair weather places, or you use extensions to make it below a 2’ 4’ or 8’ frost line.
I’d imagine it also makes repairs easier. Say a car hits a fire hydrant. It’s really only going to damage the part above ground. Having that part bolted on means you don’t have to dig out and replace the entire thing.