Years ago my Dad had a tool that he used for broken small bore pipes, usually copper. He would fit a male and female nut unit over the respective broken halves, then use an tool to flare the broken ends, and finally thread the nuts to restore pipe integrity. The tool and nuts/bolts came in a set.
Could someone please tell me what kind of tolls/set he used.
These are called flaring tools and are used for soft copper usually for gas lines. But for water lines also.
To add to Bob Mariani's post, there is a difference between flare connectors used for gas, water, and high pressure, and there are two different types of flaring tools the one shown above and the double flare tool sets used for steel hydraulic lines.