Power Flushing & Heat exchanger Descale's


A Powerflush is the most efficient & effective way of cleansing a central heating system. Water and a cleansing chemical agent are circulated around the system under controlled conditions removing all debris & sludge, This includs all pipework, valves & radiators, in addition to this if you have a system boiler the header supply tank is also thoroughly cleaned out. The powerflush pump has a high flow rate but a low pressure rate, therefore not damaging your existing pipework yet its still powerful enough  to remove stubborn limescale, corrosive sludge and debris with the help of chemicals.

If your central heating system has any of the following symptoms, it most probably needs a POWER FLUSH:

•System is slow to heat up cold spots
•Radiators need frequent bleeding(this is a sign of corrosion taking place hydrogen is gas produced)
•Dark black or brown water from radiator when bleeding.
•Boiler failure or lockout
•Noisy banging boiler and pipes
•Pump failure
•Noisy pump
•Some radiators are partially/completely cold(typical signs are a pyramid type cold patch at the bottom)
•Blocked radiators
•Pinhole leaks from radiators caused by corrosion.


•Quieter boiler due to removal of deposits on the heat exchanger (noise commonly referred to as ketteling)
•Quicker warm up times more efficient radiators.
•Lower fuel bills due to increased system efficiency could save you up to 25% of your bills
•Longer lasting system and components - pumps and radiators will have an extended life where there is no corrosion and the suitable corrosion inhibitors are in place.
•Safer environment– system is cleaned as a sealed unit without taking all radiators off walls and risking damage to furniture or floor coverings etc
•Flushing a system with plain water will generally only remove 10% of debris, powerflushing with chemical aid can increase this to as high as 95%
•A scale protected system.
•Piece of mind.
•A system cleansed to BS7593 Benchmark
•Benchmark certification.

Heat exchanger descales. 

Most people are familiar with the build up of scale on the elements of kettles and immersion heaters in hard water areas in the country, however, scale formation in closed circuit water heating systems is rarely considered.

In central heating systems, scaling is caused by the deposition of either lime or black iron oxide corrosion debris. Lime scale consists of calcium carbonate (calcite) with lesser amounts of other calcium salts such as the sulphate. Sometimes lime scale deposits contain corrosion debris which has become trapped.


Unlike most substances, most calcium salts become less soluble as the temperature rises (inverse solubility). Such salts are naturally present to some degree in all mains water supplies, therefore, any system where mains water is heated is liable to suffer from lime scale formation.

The formation of scale in a central heating system has three important effects:

  • Causes kettling noise
  • Reduced efficiency
  • Increases thermal stress in metal