Mireystock
SIip-slidin' down Big Pig...
Here's a tip. If you are using end feed or solder ring fittings on an existing system, you often get thwarted by tiny dribbles of water that cool down the fitting as you are heating it up. Jam a plug of bread down the pipe. It will act like blotting paper for a few minutes, giving you time to complete the joint. When you refill the system it will quickly dissolve.
This could be a myth but it sounds good.
Umm, thirty two years in the trade and not something I've done, or will be doing !