Sludge Build Up In Central Heating Systems

What is sludge?

Poor water quality is the no. 1 cause of central heating system breakdown

Corrosion occurs naturally in environments where metal and water meet. If left untreated in your heating system, corrosion can form into black iron-oxide sludge (‘magnetite’) and other debris can build up in all open and closed-loop heating systems, causing performance deterioration and, ultimately, failure.

By preventing and removing this debris, we can increase system efficiency, longevity and consumption. In turn, carbon emissions, energy and maintenance bills are reduced.

Symptoms of Sludge Build Up

Knowing the signs of magnetite in your system can help save you costs, downtime and stress.

Watch out for the common signs of sludge including:

• Radiators are hot at the top, but cold at the bottom

• Radiators require bleeding more frequently

• Pipework to the radiators get hot, but the radiators themselves do not

• Some radiators do not heat up to the required temperature, even when the temperature is turned up

• The boiler pump leaks or fails

• When boiler parts are removed/replaced, they are full of dirt

• The flow is boiling hot but the return is lukewarm or cold

• A noisy system including gurgling and kettling

• Higher energy bills

Effects of Sludge Build Up

If sludge is allowed to build up, it can restrict the flow of water through pipework as it begins to block the pipe. This can be particularly expensive to remediate if it blocks the pipes on the heat exchanger.

While many new boilers have heat exchangers with narrow pipes to allow for better efficiency, it’s a double edged sword. The narrow pipes also make them more vulnerable to blockages. And if affected by sludge, the heat exchanger will most likely need replacing.

Magnetite in your system escalates problems which can result in radiators, parts or even entire boilers needing to be replaced. A blocked boiler will overheat, causing it to shut down completely.

Sludge can affect your central heating system and boiler in a variety of ways. The common effects include:

• 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

So how can we remove sludge from your system?

There are two effective ways in which we can remove sludge from your system:

• MagnaCleanse

• Powerflush (learn more)