I need to do a couple of jobs on my central heating system and rather than drain it want to use one of these Pipe freezing kits, like the
8.99 one in Screwfix.It says it lasts 35 minutes - I presume this is the amount of time the pipe might stay frozen for, but how long does the actual kit last ? I need to freeze 4 x 15mmm copper pipes to seperate the pipes, and then at a later stage, freeze them again to rejoin the new radiators. Actually seperating and rejoiing the pipes shouldn't take long (I'll use push-fit fittings) so I don't need a big blockage.
Would one of these kits do - or would I need more ?
Ta
Steve