I've redone my bathroom's DWV to PVC and will be water testing it for leaks. I'm going to use a balloon seal for my clean out tee and will cap off the rest of my pipes. I'm going to fill it with water from a threaded connection in another San tee I have for my sink.
This is the first time I'm doing this kind of test since I'm a homeowner and a bit nervous. Anyone have any tips?