What Is Power Flushing?
Power flushing is a professional deep clean for your home’s central heating system. Over time, sludge, rust, and debris can build up in your radiators and pipework, reducing heat output and forcing your boiler to work harder and less efficiently. Our service uses a high-powered flushing pump and specialist cleaning chemicals to safely clear out the gunk — restoring full circulation and helping your system run like new.
Installing a new boiler? Most manufacturers now require a power flush as part of the installation process. It clears out old system sludge that could damage your new boiler and ensures your warranty remains valid.
Benefits of Power Flushing Your Heating System
✅ Improved Efficiency – Quicker radiator heat-up times and reduced energy bills.
✅ Even Heating – No more cold spots at the bottom of radiators.
✅ Quieter Operation – Say goodbye to banging pipes and kettling boilers.
✅ Boiler Protection – Removes strain on the heat exchanger and valves.
✅ Lower Repair Bills – A clean system breaks down less.
✅ Warranty Support – Required by most manufacturers when fitting a new boiler.
A flushed system can run up to 40% more efficiently, which means warmer rooms for less money on your heating bills.
How Our Power Flushing Service Works
Step 1: System Health Check
We inspect your boiler and radiators to ensure your system is safe to flush.
Step 2: Connecting the Pump
We hook up a professional flushing machine – not just any pump, this one’s built for the job.
Step 3: Chemical Cleanse
We add a powerful cleaning mix that breaks up sludge, scale, and rust.
Step 4: Radiator-by-Radiator Flush
Each radiator is flushed individually. We may reverse the flow or tap gently to dislodge stubborn muck.
Step 5: Final Flush & Inhibitor
We rinse everything with clean water, then add a corrosion inhibitor to protect your system long-term.
We normally complete most system power flushes within one day.
Signs You May Need a Power Flush
❌ Cold spots at the bottom of radiators
❌ Radiators slow to heat
❌ Frequent bleeding required
❌ Noisy boiler or kettling sounds
❌ Dirty water when bleeding radiators
❌ Boiler error codes or cutting out
❌ Unexplained rise in heating bills
❌ Pump or valve failures
❌ Installing a new boiler onto an old system
If you’ve got radiators that just won’t warm up, noisy pipes, or sky-high heating bills. Smart Heat Experts will sort it.
Why Choose Smart Heat Experts?
We follow best practice standards such as BS7593:2006 to ensure your system is flushed safely and effectively.
✔ Local team in Haywards Heath (RH16)
✔ Gas Safe registered engineers
✔ Trusted by Sussex homeowners
✔ Transparent, fixed-price quotes
✔ Fast turnaround, flexible scheduling
✔ Rated highly by local customers
🔗 Also see our Boiler Servicing page for annual maintenance.
We provide expert power flushing across Haywards Heath, Burgess Hill, Lindfield, Cuckfield, Crawley, Uckfield, and throughout RH16, RH15, and BN6 postcodes.
Frequently Asked Questions About Power Flushing
💬 How often should I power flush my central heating system?
We recommend a power flush every 10 - 15 years, however, looked after each year with regular water testing during annual boiler service. It’s also best practice before installing a new boiler, especially if your current system is more than 5 years old. Many boiler manufacturers require this to protect your warranty.
💬 How long does a power flush take?
Typically, between 5 and 8 hours, depending on the number of radiators and severity of sludge in your system. it is typically a one day job, unless otherwise stated.
💬 Will power flushing fix cold radiators?
Yes, if your radiators are warm at the top but cold at the bottom, it's a classic sign of sludge build-up. A power flush clears out these deposits, so heat circulates properly and radiators warm fully and evenly.
💬 What does a power flush do for my boiler?
It reduces strain on your boiler by restoring free-flowing circulation. That means fewer error codes, less risk of component failure, and often a quieter boiler with no more kettling sounds…. It can even extend the life of your boiler by years by preventing corrosion-related damage.
💬 Is power flushing safe for my boiler and pipes?
A Lot of companies will simply go ahead without explaining any risks, we are open and honest.
Powerflushing does pose risks, more so on older pipework and radiators, risks of leaks and pipework coming apart, however, this is extremely rare and something we can generally foresee as an issue, what we will say, is that, if the powerflush is to uncover these faults, it is only a matter of time, before they come apparent any way.
💬 How much does a power flush cost?
It depends on how many radiators you have and the complexity of your system. We’ll provide a fixed price quote upfront after a quick assessment – no hidden costs, just transparent pricing.
Get in touch today for a free quote.
💬 Can power flushing help reduce my energy bills?
Yes – a clean system heats up faster and more evenly, so your boiler works less to achieve the same comfort. Customers often see noticeably lower gas bills after a flush. Some estimates suggest up to 40% better efficiency in heavily sludged systems.
💬 Will I need to power flush again in future?
Not for a while. We add protective inhibitors to help keep your system clean. However, it’s still recommended every 10-15 years, or whenever a new boiler is fitted to an older system, to prevent future buildup, but if we look after your boiler, with our service plans, we will regularly check.
💬 What if I’ve already had issues like pump failures or radiators not heating?
These are classic symptoms of internal sludge. In some cases, replacing a failed pump without flushing the system just causes the new one to seize up too. A power flush solves the root cause – the blockage – not just the symptom.
Areas We Cover for Power Flushing
We provide expert power flushing services throughout Haywards Heath and the surrounding Sussex areas. If you’re located within 15–20 miles of RH16, you’re firmly within our service zone.
🔘 Haywards Heath 🔘 Lindfield 🔘 Cuckfield 🔘 Ardingly 🔘 Balcombe 🔘 Scaynes Hill 🔘 Wivelsfield 🔘 Horsted Keynes 🔘 Handcross 🔘 Staplefield 🔘 Ansty 🔘 Burgess Hill 🔘 Hassocks 🔘 Hurstpierpoint 🔘 Sayers Common 🔘 Ditchling 🔘 Plumpton 🔘 Newick 🔘 Chailey 🔘 South Chailey 🔘 Uckfield 🔘 Crawley 🔘 Crawley Down 🔘 Copthorne 🔘 Worth 🔘 East Grinstead 🔘 Forest Row 🔘 Barcombe 🔘 Albourne 🔘 Lewes
If your town or village isn’t listed here but you’re nearby, just get in touch — we’ll be happy to confirm if we can reach you.