 We have a good network of hydrants that cover every single address in the city and we try to get a crew on scene with their hands on the hydrant to check them out every year. Does it work? We don't care how old it is, how new it is, what the paint condition looks like. Can we open it up and when we turn the nut at the top will we get water out of it? It's a couple hundred gallons worth of water pouring out of the hydrant. Turn on all of your faucets, you know, flush your toilet, run your bath at the same time and you don't even come close. I would argue that whatever the city spends is well worth it for peace of mind to know that that critical piece of public safety infrastructure is in good working order.