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Power Flushing

Powerflushing is the process by which heating systems are cleansed using water at high velocity, but low pressure, so that no physical damage is caused to the system. The process can be made even more effective with the addition of powerful cleansing and mobilising agents.

The objective is to restore systems with circulation and boiler noise problems (caused by sludge and corrosion deposits) to optimum operation. Power flushing removes these deposits and the problems that they cause.

Power Flushing and how it works

It is prudent to power flush a heating system immediately before fitting a new boiler to an existing system to prevent problems that can occur in the future. Many systems are found to contain corrosion and sludge, even if no flow problems have yet shown themselves.

Existing debris is often mobilised by alterations to the system or pipework and also the increased efficiency of the new boiler. This may then accumulate in the boiler heat exchanger causing noisy operation, reduced efficiency and, in extreme circumstances, failure of the boiler. The high efficiency and compact nature of modern boilers developed to minimise fuel costs and pollution, means that they are more susceptible to problems caused by debris in the system water.

Radiator Sludge

You may notice that one or more of your radiators are warm at the top and sides but cold in the middle, this can indicate a build-up of "sludge" otherwise known as magnetite in the radiator.

Most central heating systems develop this sludge over time. It starts as in the diagram below with a small amount of deposit building up in the bottom of the radiator.

Radiator Sludge

As the water flows past the obstruction it is diverted into a circular pattern through the radiator and this enables the build-up of additional deposits over time.

Raditator Sludge

Removing these deposits requires care as disturbing the sludge could simply redistribute it to your other radiators, expanding the problem in future years. Worse still, the sludge could reach your boiler and restrict the flow of circulating water as well as reducing the lifetime of the components it comes into contact with.

You should not replace or update your boiler without removing these contaminants and debris. As the sludge and general dirt are disturbed in a new installation, it will find its way into your new boiler and reduce its effectiveness and life span.

At Newton Heating and Plumbing we can Powerflush your system, removing magnetite sludge and helping to alleviate:

Failure to professionally powerflush a system will result in a steady reduction of the efficiency of your boiler, as it has to work harder to get the heat around the system due to the increasing production of magnetite coating pipes, and fouling radiators.

Newton Heating and Plumbing use the Kamco CF30 powerflushing machine along with an Adey MagnaClean Powerflushing filter, and a chemical cleaner to remove the magnetite and debris. A powerflushing machine on its own will not fully remove the sludge. A chemical solution is used to loosen up the sludge and debris, whilst a powerful magnet in the MagnaClean filter enables us to remove the magnetite out of your system.

Once your system is free from sludge, an inhibitor is added to your system to reduce further corrosion.

An optional protective measure for your system after powerflushing would be to install the Adey MagnaClean Professional. This device is designed to remove magnetite on a daily basis reducing the need for future powerflushes.

Finally, the benefits of a professional powerflush will include the following:

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