I have to replace a 35 year old champion sprinkler valve and wanted to update to the new automatics for my lawn irrigation system. I need some advice with how to do it? The valves are in a confined area, a little over 14in. sq. The sidewalk and foundation of the house are on the sides and the hose pipe is next to it, so I was thinking of just getting out my oxy/acetelene torch with cutting tip and just torching it off. There are three valves, the first about 5in. from the foundation, the next 1 1/2in. from the first, and the last is 1 1/4in. away from the second and 1 1/2in. away from the sidewalk. I think that covers it all, any suggestions?? Thanks for any suggestions, AJ