I'm rubbish at it. I have a shower with two heads. The pipe of the overhead one doesn't sit snugly into the pipe attaching it to the thermostat. It looks fine, but when I switch it to that head water rains out where the 2 pipes meet. This is a replacement shower; the first was the same model and the guy who fit it had the pipe fabricated to fit properly. The guy who fit this one has buggered off. Rather than faff around getting it fabricated (would anyone take on such a small job?) could I just use some form of sealant? Ta in advance.