When my family and I went to leave for a short vacation yesterday I went around the house to turn the water off as I usually do. When I want to turn off the hot water line going to the washing machine and snapped off. Water was shooting everywhere and it took me a few seconds to figure out what I should do to turn the water off. I ran to the water heater and turned off the lever that turns off the hot water. And then the hot water stop flowing. My hand was really burned from the hot water but I got the area cleaned up. We almost canceled the vacation but I felt that the water had stopped for me turning it off at the hot water heater. Here's a picture of what snapped off. Is there a way that I can repair this without cutting open the wall? I'm a mechanic by trade so I have tools and skills. I've just never worked on anything plumbing related before. Please help us as we recover from vacation tomorrow and my family will not have any hot water. Thanks for any tips.