Regulars may remember the conversations we had earlier this year regarding the installation of a used Rangemaster cooker, which went well, with a gas man running a copper pipe from the kitchen, through an external wall to two 47kg Calor Gas propane orange cylinders. One of the cylinders is now empty. Before I attack the thing, do I remember reading that the connection to the cylinder is left hand thread?
When I get the new cylinder, is there anything special about the connection? Any tape or gunk to make a seal, or just tighten well with a larger spanner?