Radiator Power Flush

Over time the efficiency of your central heating system might be reduced. We know it can be frustrating if your central heating system isn’t working efficiently.

If the radiators in your home aren’t heating your rooms as quickly as they should, a power flush might be needed. This could increase the efficiency of your central heating system by as much as 30%, meaning cheaper fuel bills in the future.

Call one of our heating and hot water experts today. We can answer any questions you have about power flushing.

Customer reviews

  • And a quick note to everyone at Aspect to say thank you for being such an efficient, effective and easy company to deal with. Fantastic service! Much appreciated.

    Alex, Herne Hill, SE24

  • Fast, efficient and friendly service.

    Cherry, Brompton, SW10

  • I called Aspect with an urgent issue, they managed to fit me in the same day at the time I needed, they turned up on time and dealt with the issue immediately, and offered lots of good advice.

    Fatima, Streatham, SW16

No hidden extras

What you get from Aspect

  • Experienced & vetted tradespeople
  • 24 hour availability for all trades
  • Dedicated Service Support Manager
  • Aspect Guarantee on workmanship
  • Peace of mind from trade accreditation

Occasional extra costs

  • Parts and materials used
  • Collection of parts and materials
  • Ultra Low Emission Zone (ULEZ) charge

We won’t charge you for

  • Cost of parking
  • Fuel or travel time
  • Congestion Charge

Why is power flushing needed?

The water held in a central heating system would normally corrode steel or iron radiators. When a central heating system is installed a dose of system protector, or ‘inhibitor’, is added to the water. This prevents corrosion in the form of ferrous oxide (rust).

Over time the amount of inhibitor in a central heating system can be reduced. This happens as a result of topping up the water in the system. System leaks, draining radiators or adding new radiators would all mean adding water to a central heating system.

Once the dose of inhibitor has been reduced the process of corrosion starts and ferrous oxide is created. This solid is kept suspended in the water as it flows at high velocity through the system, but it will settle as a dark sludge where the velocity of water flow is lower.

Water flow velocity is lowest at the centre of a radiator. As the sludge settles in the same part of the radiator it gradually builds up and forms a solid mass. This build-up prevents hot water from coming into contact with that part of the radiator panel. This reduces the energy output of the radiator.

Radiators need to remain on for longer to reach the comfort temperature set for the room. This means the boiler is burning more gas as it’s working for longer than it would otherwise need to. Power flushing can help correct this.

A power flush removes sludge and restores performance of the central heating system.

The power flushing process

A power flush takes at least 4 hours depending on the size of the system and amount of sludge present.

Cleaning chemicals are pumped at an increased pressure through the system. At the right temperature they help to break down the sludge that has settled. The power flushing machine removes particles that are suspended in the chemical solution.

Once the sludge has been removed the system is topped up with clean water and the correct dose of inhibitor is added to prevent future corrosion.

Our guarantee and accreditations

We’re fully trade accredited. Aspect is registered with Gas Safe and is a member of the Building Engineering Services Association (BESA). In addition, the Aspect Guarantee covers our tradesmen’s workmanship for up to 12 months.

When you book an Aspect gas engineer for a power flush you can count on getting the professional expertise you’re looking for.

Need more info before booking a gas engineer? Someone from our team can call you.  Request a callback

Account customers

We have a dedicated team of account handlers to support multi-site customers and commercial properties: Restaurants, Bars, Offices, Retail, Landlords, Letting Agencies, Hotels, Schools, Embassies, Care Homes and more.

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