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Corrosion in a Boiler

To test the water in your heating system, take around one pint of water from your boiler or one of your radiators. The colour will tell you everything, for example orange coloured means its rusting, and black means that your system is filled with a sludgy mass.Either way the system needs treating straight away with something called a corrosion inhibitor. Should no signs be apparent. Try this test:Place a nail in a jar containing a sample of tap water and one in a jar with some of your system water. After a few days the nail in the tap water should rust, but if your system contains enough corrosion inhibitor, the nail in the system water will be unaffected. It is important to use the same product that is already in the system, if you don’t know what it is, then flush the system, then refill with fresh water and new inhibitor. Edgeware Plumbers use corrosion inhibitor.Corrosion Inhibitor:Corrosion can be slowed by adding a proprietary corrosion inhibitor to your system. It is recommended this is done when the system is first fitted, but the inhibitor may be put into the system at any time, as long as the boiler is descaled first. When the system has been operating for a long time some time, it is better to flush it out first by draining and refilling it a few times until the water is running clean. Alternatively drain off about 20ltrs of water, this should be enough to empty the feed and expansion tank and a small amount of pipework. Next pour the inhibitor into the tank and turn the water supply which will carry the inhibitor into the pipework. Around 5ltrs is usually enough for most systems, but check the suppliers instructions. Switch on the pump to circulate the inhibitor through the system. An Edgeware Plumber is trained to add inhibitor.Magnets and Softener:There are low voltage magnetic coils that create a magnetic field that is supposed to stop the formation of scale on the heat exchanger of your boiler. Unless you have soft water in your area, the only way to really avoid hard water in the system is to install a water softener. Before fitting any device to reduce scale, it is essential to seek the boiler manufacturers advice.

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