2. Why should I get the water in my central heating system cleaned

Why should I get the water in my central heating system cleaned?

If sludge is allowed to build up, it can result in blocked pipes, inefficient radiators and damaged parts in the boiler.

 

The heat exchanger in a boiler consists of many narrow pathwayswhich the water passes through to heat up. If these become restricted or blocked, the boiler will shut down to prevent it from overheating and getting even more damaged.  If the boiler breaks down because of sludge in the system, the repair work is not covered by the boiler warranty and could lead to expensive repair bills.

 

Sludge can cause:

 

  • Damage to the boiler
  • Damage to the boiler pump
  • Damage to radiators, including leaks
  • Damage to radiator valves
  • Blocked pipework, including on the heat exchanger
  • Higher energy bills

What is central heating sludge?

Sludge, or magnetite, to give it its proper name, is a black substance in the central heating pipes made up of dissolved and rusted metal.

How do I know if I've got sludge in my central heating system?

Read on to find out what the common signs of sludge in your central heating system are.

Related FAQs

How do I know if I've got sludge in my central heating system?

If you notice your radiators are hot at the top but cold at the bottom, or need to bleed your radiators more often, then you may have sludge built up in your system. 

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Does my boiler filter need cleaning?

Your filter should be cleaned during your boiler’s annual service. This will prevent sludge building up in your system. Some filters come with an app that can warn you when they filter needs to be cleaned, so that you can arrange for your installer to visit before it gets too full.

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What is central heating sludge?

Central heating sludge is a substance that builds up in central heating pipes as a result of rusted and dissolved metal settling in the system.

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Do I have to have a magnetic boiler filter installed?

Having a magnetic filter installed is considered best practice when installing a new boiler, and your installer will be required to carry out a series of important steps to ensure their work is compliant with the Building Regulations in England and Wales. 

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What is a magnetic boiler filter?

A magnetic boiler filter is a small device that is installed into the pipework close to where the water goes back into a boiler. It is used to prevent the buildup of sludge within the pipework, which can cause the boiler to break down if left untreated. 

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