Find The Best Service For Pipe Isolation in Coolaroo, Contact Australian Pipe Freezing Services, If you have a piping system that requires pipe repair or valve replacement, pipe freezing allows this to be carried out by freezing the system’s liquid contents to form a ‘freeze plug’. This freeze plugging stops the flow of fluid in the pipes so that pipeline maintenance can be completed.Pipe freezing is a non-intrusive, cost effective and time saving method of pipe isolation allowing pipeline maintenance and pipeline modification to be carried out without the need to drain down the system.