Cold flushing - This will remove much of the debris left over from the installation process., Hot flushing - The hot water separates excess jointing compounds, flux residues and oils from the pipework and components, lock shield valve - Used to balance the system when the system is commissioned, Index radiator - This is the radiator that heats up last and therefore has the greatest resistance, Venting - This is a process of releasing trapped air or hydrogen from the top of a radiator, Magnetite - This creates a cool/cold area at the bottom of the radiator., Inhibitor - Chemical protection against scale and corrosion within a central heating system, Soundness test - A combined test for water tightness and pressure verification,

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