Homeowner had recently replaced the washing machine. During this process the valves were not functioning properly. Today we accessed through the drywall and removed it. Cut and removed section of drain pipe and water lines. Attached to the existing with new. Secured the new wash box to the studs. Replaced the washing machine supply lines and verified connections. The water pressure was reading high and so we replaced it with a new one. Adjusted water pressure to homeowners acceptable psi. Cleaned up and tested everything.