My central heating pump has just packed up (I think it froze in cold weather) and I'm busy replacing it. Looking at the fittings I built it with about a year ago I find there has been some weepage between the iron pump fittings and the brass end-fittings for the copper tube system. I had used PTFE tape here - is this "the best"?
In the past I have tried Boss white (or green) and hate the stuff, though admittedly I haven't tried it with hemp. I also have Atmos sealant (a type of grease), Loctite 55 cord, and EverBuild pipe seal (a liquid perspex type of setting sealant). Before I fill the system and add all the inhibitor - any suggestions as to which is best?
Thanks
Roger