Central Heating Powerflush

What a central heating powerflush delivers

A powerflush targets contamination on the distribution side of your heating system, improving circulation and radiator performance.

• Removes sludge, magnetite and debris from radiators and pipework
• Improves heat output and helps radiators warm up more evenly
• Reduces kettling and gurgling noises linked to poor circulation
• Helps protect pumps, valves and heat exchangers from blockages
• Restores system water quality, typically finishing with inhibitor added
• Leaves the system refilled, bled and tested for proper operation

When a powerflush is the right option

A powerflush is most useful when heating performance has dropped or the system shows signs of contamination. Common triggers include cold spots on radiators, slow warm-up times, frequent need to bleed radiators, or noisy operation from the boiler or pump. It is also often recommended after major system work, or before installing new components that could be damaged by dirty system water.

What happens during the visit

The system is checked first, then a powerflushing unit is connected to circulate cleaning solution at high velocity. Each radiator is worked through in turn to dislodge deposits, then the system is flushed with clean water until it runs clear. Finally, the system is refilled, inhibitor is added, and key checks are completed such as pressure, bleeding and heat-up across radiators.

Aftercare and ongoing efficiency

After a powerflush, keeping inhibitor at the correct level helps slow future corrosion and sludge build-up. If your system has a magnetic filter, it should be cleaned regularly, especially in the weeks after the flush as any remaining fine particles are captured. If uneven heating returns, it is worth arranging a check for balancing, valve issues, or circulation faults so problems are addressed early.