Power Flush | Aspect: Transforming Property Care

When sludge builds up in your radiators, it can greatly affect how they heat your rooms. Caused by the gradual corrosion of water on the metal parts of your central heating system over many years, this sludge or ‘magnetite’ reduces the amount of heat transferred from your radiators. Magnetite tends to settle within radiators where the flow rate is lower. In turn, your boiler must work longer and harder for a radiator to reach the temperature on your thermostat.

A system power flush clears this sludge away, helping to restore the efficiency of your radiators so you can save on your energy bills.

Does your system need a power flush?

There are three ways to tell if power flushing may be needed:

A thermal imaging camera can check for cool areas on your radiators
By sending a water sample for testing, resulting in a yes / no answer
You may be able to feel for cold spots with the back of your hand

Radiators may have cold spots or heat up slowly for other reasons too, so feeling with your hand is the least reliable method of telling if a system power flush would be beneficial. You’ll only know for sure by arranging a visit from an engineer.

We can check for temperature issues within your radiators (the cold areas are shown as dark spots on a thermal imaging camera) and collect a water sample for testing so we can make a clear recommendation. With these methods, you can trust our engineers to perform a power flush only when necessary.

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
Another great experience from Aspect. Joe helped to solve my radiator issue. He took the time to explain how to troubleshoot any issues in the future and checked everything several times to make sure it was all working well following his work. Highly recommend.

Benjamin, Kingston-Upon-Thames, KT2
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

Our gas engineer rates

Set prices from £390.00
Up to four radiators
Extra radiators from £65.00
Prices are excluding VAT

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No hidden extras

What you get from Aspect

Experienced & vetted tradespeople
24 hour availability for all trades
Dedicated technical support team
Aspect Guarantee on workmanship
Peace of mind from trade accreditation

Occasional extra costs

Parts and materials used
Collection of parts and materials

We won’t charge you for

Cost of parking
Fuel or travel time
Congestion Charge
ULEZ charge

How does power flushing work?

A power flushing machine pumps clean water and a special cleaning solution through your central heating system to remove the dirt, scale and sludge inside. To start, we connect the machine to the pipework, flush for at least 2 hours and then remove the dirty water.

We then flush each radiator individually for around 30 minutes, before flushing the whole system at once until it’s clean – removing the magnetite that’s known for blocking radiator heat transfer. We’ll then vent and test the system. The process usually takes a full day, depending on the size and type of heating system you own.

Your engineer completes the system power flush by adding the correct amount of inhibitor that helps reduce corrosion in the future. We can also perform a chemical flush at a later date (done by simply running the boiler to let the chemicals circulate), which is a good way to keep your system clean a year or more after power flushing.

Want to learn more about power flushing? We’ll give you a call. Request a callback

Our guarantee and accreditations

We’re fully trade accredited to power flush radiators and work on any part of your heating system. Aspect is registered with Gas Safe and a member of the Building Engineering Services Association (BESA). We also provide a 12-month guarantee for all workmanship that our engineers provide.

When you book a system power flush from a member of our team, you can count on getting a professional service and the friendly advice you need.

Areas we cover

Our qualified engineers work in Central London and all of the London boroughs. We can also perform a system power flush anywhere in the Home Counties, including Berkshire, Bedfordshire, Buckinghamshire, Hertfordshire, Essex, Kent, Surrey and Sussex.

If you’d like to book power flushing or need help with your pipes and radiators outside of this area, we may still be able to help. Our scheduling team will check availability and see if an engineer can be sent to you.

Submit your callback request and someone will be in touch. We’re ready to take your call 24 hours a day, 365 days a year.

Submit your request here

Account customers

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

More about our account services

Can’t find what you’re looking for?

Our other heating & hot water services

You can book our Gas Safe registered engineers for a variety of jobs. Read more about the range of services we provide here: –

Landlord gas safety certificates; with an annual certificate (CP12), you show that you’ve done your part to keep your rented accommodation safe
The annual boiler service; yearly servicing maximises the lifespan of combi boilers and it’s the only way to keep their manufacturer warranties valid
Same-day boiler repair; if you have low or high pressure, or any other problem, we can send someone within the hour to start fixing your boiler
Gas boiler installations; when you’re buying a property, it makes financial sense to get your heating assessed well in advance
A central heating system report; when you’re buying a property it makes financial sense to have the central heating system assessed in advance

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