Basically it was leaking at the olive, it was just evident at the threads, the olive is the water sealing part of the fitting. If it was a new olive then it should compress & seal against the pipe/fitting without issue, especially if it was a copper olive. If it was brass then that would have taken a bit more effort.
ISO valves are fitted to allow the isolation of different areas for repair/servicing without shutting down the whole house.
ISO valves are fitted to allow the isolation of different areas for repair/servicing without shutting down the whole house.
