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Central heating system clean

Power Flushing Lewisham

Over time, central heating systems in Lewisham properties accumulate magnetite sludge, limescale and debris that reduce efficiency and can void boiler warranties. A professional power flush circulates water and chemicals through the system at high velocity to remove these deposits — restoring radiator output and protecting the boiler heat exchanger.

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Power Flushing in Lewisham — What You Need to Know

Over time, central heating systems in Lewisham properties accumulate magnetite sludge, limescale and debris that reduce efficiency and can void boiler warranties. A professional power flush circulates water and chemicals through the system at high velocity to remove these deposits — restoring radiator output and protecting the boiler heat exchanger. Victorian terraces in Brockley and Honor Oak have clay drain runs that are vulnerable to tree root ingress — a common cause of recurring blockages in mature residential streets.

What's included

  • Full system power flush with professional machine
  • Chemical cleanse and inhibitor dose
  • Radiator-by-radiator flush and check
  • Magnetic filter installation
  • System rebalancing after flush
  • Pre-boiler installation flush
  • Post-flush water quality test
  • Inhibitor certificate for boiler warranty
Fixed price by number of radiators. Includes chemicals, inhibitor and magnetic filter fitting.

Coverage — Lewisham (BR1, SE4, SE6, SE8, SE12–14, SE23)

Postcodes served: BR1, SE4, SE6, SE8, SE12–14, SE23

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Common Questions — Power Flushing in Lewisham

How much does power flushing cost in Lewisham?
We price power flushes by the number of radiators: typically £300–£500 for a standard home, including chemicals, inhibitor and magnetic filter fitting. We'll confirm the exact price before starting work.
Will a power flush damage old radiators?
A power flush should not damage radiators that are structurally sound. If a radiator is severely corroded or pin-holed, the power flush process may reveal an existing weakness — in this case we'll advise on replacement before proceeding.
How often do Lewisham properties need power flushing?
Every 5–8 years for most systems, or when you're installing a new boiler. Hard water areas like Lewisham may benefit from more frequent maintenance. Fitting a magnetic filter after a flush significantly extends the interval.
Do I need a power flush before my new boiler is installed?
Most boiler manufacturers require the system to be clean and an inhibitor to be present as a condition of warranty. Power flushing before installation is strongly recommended and sometimes mandatory to validate the warranty.

More services in Lewisham

Emergency PlumberBoiler RepairBlocked DrainsLeak DetectionBurst Pipe RepairGas Safety Cert (CP12)CCTV Drain SurveyCentral HeatingPower Flushing
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