Removed a pipe from a boss on a soil stack (it's almost becoming a hobby). I was going to cap it but it was all in generally poor nick so I removed it all leaving, obviously, a hole. This is a job beyond gaffer tape as it turns out! Even temporarily but the less said about that the better. :(
My first reaction was to replace a section containing the hole but I couldn't be arsed so had a brainwave, I cut a few inches from a new pipe, then 2 cuts down that piece lengthways to remove about 30 percent of the pipe leaving a C shape.
This satisfyingly clipped tightly on and i've solvent welded it.
I'm sure this has been done before but in case that helps anyone....