I have an outdoor, aboveground oil tank for heating the house. We recently had some work done and the tank was moved. Now however, I want to move it back. It's only a meter or so that it needs to shift. I’ve run it down so that it’s almost empty and shouldn’t have any problems lifting it with a few friends. As far as I can tell, the process should be pretty simple. There are two copper pipes running out of the tank and along to the boiler, which is also outside. I was planning to turn off the boiler, turn the stopcock on the pipes inside the tank, then cut the pipes and stopper them. Then I’ll move the tank and reconnect the pipes with compression fittings. Nice and easy. I’m no stranger to simple plumbing work, but wanted to double check that there aren’t any issues that I haven’t considered. No harm’s going to come to anything because I let a bit of air into the pipes or anything like that? I won't be tinkering with the boiler itself. Any advice will be gratefully received.