On systems that have been installed for some time and have not been treated with inhibitors, or which do not have a particle filter installed, there is a fair chance that magnatite (i.e. sludge) will be present in either the boiler, the system pipework, or the radiators themselves.
Some of the tell-tale signs that sludge is present are a noisy boiler, cold radiators, and radiators which are slow to warm up.
When a boiler is being used with a high demand for heat/gas consumption.
In addition, when the hot water is being drawn the boiler may make high-pitched whining noises, indicating possible sludge in the heat exchanger, or in the pump which is struggling to push warm water around the unit.
In conventional boilers, the noise sounds like a kettle boiling and the condition is called "Kettling". This is because the magnatite produces hydrogen bubbles in the water and as the water gets hot the bubbles start to pop and disperse inside the boiler, producing the kettling noise.
If sludge is present in radiators, two conditions can arise:
This could indicate that the pump or pipework is sludged up.
A noisy pump can be a tired pump because it is struggling to distribute the heat that the boiler has generated due to sludge.
If the pipework is sludged up, the heat cannot be distributed to the radiators.
To the boiler:
To you:
UNNECESSARY EXPENSE!!!!!!!
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