Main cutoff

[ATTACH]72371[/ATTACH] Hi all, I have a cap similar to the above photo, mueller water, it says. (Disregard the smaller cut pipe in the picture) The utility office guy told me on the phone that this is probably the access point to shut-off water to the home. I sat down and patiently chipped/dug a channel around my cap. It's at surface level of an asphalt drive just like in the photo. After doing so, I could at least determine that it probably was a cap, mushroom shaped, and the outside wall of the pipe it covers is just inside the 2 holes, in this one. My question: Do I pry up, use tools for leverage and try to "unscrew", or something else? My only other experience with this sort of access was a clearly marked lift off cover, underneath which & 2 feet down, was a slotted "key" to shut off the main water supply with a 1/2 turn. I'm proceeding carefully because I'm broke and can't afford a big problem. Any informed help would be greatly appreciated. Thanks

I have 4 red wires going to 4 zones. My question, could I combine 2 zones together, making instead 4 total zones to make 2 total zones by simply joining 2 red wires together. Making say, zones 1&2 come on at the same time. My pump cycles on and off every 30 seconds or so, yes there is a 20 gal tank on the system and one horse submersible.