Hi, The rising main in my house is galvanised? steel, 1/2" and I want to change and move the stopcock slightly, changing the pipework after the stopcock to 15mm copper. Does anyone know what connectors to use for attaching to the steel (compression hopefully) then changing to 15mm after? Also, will it be ok to cut the existing steel with a hacksaw as I assume pipesplice wont fit this? Many thanks in advance.