How do I remove this exterior Water Valve cap?
Careful what you are prying up on, the 5 sided nut is what removes the cast iron top. usually the city only wants a licensed plumber to open these, if not the city plumber only. I refer to it as city since it is not a well. Those plastic items on top may very well be the remote sensor to read the usage for billing. It is just a guess, I have never seen anything like that above/on the cast iron cover. Usually the cover is removed to read the gallons used. but this seems a hi-tech model....