What Is Power Flushing?
Power flushing is a professional deep-clean of your central heating system. A specialist machine pumps water at high velocity through your radiators, pipework, and boiler, combined with chemical cleaners that break down sludge, rust, and limescale. The contaminated water is then expelled and replaced with clean, inhibitor-treated water.
Why Do Systems Get Contaminated?
All central heating systems use the same water circulating in a closed loop. Over time, this water reacts with metal components — creating iron oxide, commonly called sludge or magnetite. This black, gritty substance builds up in the bottom of radiators, clogs valves, wears out pump bearings, and coats heat exchanger surfaces, significantly reducing efficiency.
Signs Your System Needs a Power Flush
The Power Flushing Process
A Halo Heating engineer will connect the power flushing unit to your system, typically via the pump or radiator connections. Chemical descaler and cleaner are introduced and circulated through every part of the system. Each radiator is isolated and treated individually. A powerful magnet captures iron oxide particles. The system is then thoroughly rinsed with clean water before inhibitor chemicals are added to protect against future corrosion.
How Long Does It Take?
A typical three-bedroom home takes 6–8 hours. Larger or heavily contaminated systems may take longer.
When Should You Power Flush?
Contact Halo Heating on 01483 676108 to discuss whether your system would benefit from a power flush.
Need Professional Help?
Our Gas Safe registered engineers cover Surrey and surrounding areas. Call for a free quote or to book an engineer.
Call 01483 676108