4 Different Types of Copper Pipe and How to Choose One TypeFitting Methods Type K•Soldered •Compression •Push-fit •Press-connect •Flare (flexible pipe) Type L•Soldered •Compression •Push-fit •Press-connect •Flare (flexible pipe) Type M•Soldered •Compression •Push-fit •Press-connect DWVSoldered, Slip-joint Sep 1, 2022