10mm Compression Coupling supplied complete with olives. Sometimes these are known as compression couplers and are used to make a reliable solid and re-usable joint in 10mm copper pipe (or 10mm microbore pipe) without the need for any hot work.
Compression fittings should be moderately tightened using grips or a spanner and once the system is pressurised, if leaks are noticed the compression fittings should be tightened until the leak is eliminated. If a compression fitting is re-used the olives should be replaced, an olive removal tool may help in this.
