[This is a picture of the 2 lines that I disconnected when I went from 2 sinks to 1. I did not attach either one when I hooked up the new lines for the 1 sink . I do not have any fixtures attached to any lines, ( shower, toilet and new sink ). I was just doing leak test before putting up walls . When I turn on the water to the new lines ,I lose hot water to whole house . Nothing crossed , and water does come out, but not hot water. Do I need to hook up one of the disconnected lines to new hot water line.? I thought they were hammer resisters.