Determine cause of basement ceiling leak
I have a ceiling leak in the sheetrock of two rooms in the basement. Problem occurs when I use the washing machine. Both spots leak when I use the washing machine. As a test, I took a garden hose and poured some water into the drain pipe opening and only one of the two ceiling spots showed wetness. Can I safely conclude that one leak is caused by the drain pipe and the other the water supply line into the washing machine? Any other suggestions on ways to isolate/determine the cause of the leak...Is the best bet to cut away some sheetrock to see whats going on?
Any help/thoughts is greatly appreciated....