The success of a power flush will depend on the level of heating system corrosion which has occurred beforehand.
The process will cure most circulation problems, but cannot undo the corrosion and gradual decay that has led to the need to power flush the system.
Whilst it is rare for a heating system to experience leaks after the power flushing process, it is not possible to inspect a system internally beforehand.
The need to use a flushing and dispersing chemical for effective cleansing means that occasionally we may find a leak.
The advanced stage of corrosion required for such a situation means that the leak would occur imminently even without a power flush.
We believe that it is better that it occurs whilst we are present to remedy the problem rather than for it to arise over a weekend or whilst the house is unoccupied.
Systems which have been neglected over a period of time or have not been treated with an effective corrosion inhibitor may have severely compacted corrosion debris in the pipework, radiators or boiler.
It is possible that even after the power flush, some radiators may still not be fully effective or boilers on the margin of failure may cease working.
This is due to sludge and debris later breaking loose and collecting in the heat exchanger.