Hi: I need to replace the main water supply shut off valve because the existing valve passes water and leaks. The valve is located in the basement directly downstream of the water meter, as shown in attached a photos. The City will turn off water to my house so I can work on the valve. I want to replace the existing valve with a new ball valve and have some concerns / questions: 1. The face to face dimensions of the existing valve is 2-1/4 inches? I found a threaded ball valve with face to face dimension of 2-5/16 inches. Will the new ball valve work in the space or will the 1/16 inch difference cause problems when I try to reassemble the piping? For example, will I need a shorter piece of pipe between the valve and the meter? 2. There's tamper proof copper wire on the bolt immediately upstream of the valve. Is is okay to cut this wire or is it a code violation? 3. I'm assuming the bolt connection at the meter is a compression joint. Possibly flared end. What do you think? Do you think this joint will reseal after being taken apart and put back together with the same pipe? 4. Do I need to use any thread compound (pipe dope) at the joints. Any brand names I should try? 5. Would it be better to cut out the existing valve, the downstream elbow, and the threaded portion of the upstream pipe and replace with new copper pipe and valve. In this case I would have to use sweat joints. The pipe between the valve and the meter could be brass so I'm not sure a sweat joint will work? I would appreciate any advice or suggestions you have. Thanks for your help.