We would like to make it clear that :

  • It's possible that In some cases there might be radiators that will have to be physically removed and washed out or flushed manually as the iron oxide, sludge and debris in them, may be more difficult to remove
  • On combi boilers with hot water problems; the secondary or plate heat exchanger might have to be manually removed and flushed out or de-scaled as power flushing the process cannot always clean this part completely.
  • The cold feed can also be a problem area and in some cases it will have to be replaced before work can commence.
  • On open vented systems may have the "H" cut out and cleaned/replaced prior to the process, due to the build-up of iron oxide, sludge and or hard debris.
  • Removing radiator valves for any reason except to connect the power flush machine into the system.
  • Fitting magnetic filters / any pipe work alterations.
  • Any remedial works needed to the boiler or system.
  • All additional work is chargeable but will be agreed by you in advance.

Work that might be needed that is seen as outside the scope of a standard power flush is not included in the price.


The core component of a heating system is the boiler. When a boiler is renewed, the boiler manufacturers’ Benchmark scheme requires that the system be thoroughly cleansed to the BS7593:2006 Code of Practice. Currently, best industry practice is considered to be to power flush the system.

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, and 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 pipe work, radiators, or boiler, and 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 due to sludge and debris later breaking loose and collecting in the heat exchanger.

The price that we have stated allows for a standard power flush only and if any of the above or similar problems arise during or after the power flush we will not hold ourselves responsible in any way.

Any further work required would be carried out at an additional cost. In the event that we are sub-contracting, all work refers to your plumber.