Our Services
Powerflushing
About This Service
Powerflushing Specialists with 26 Years Experience
95+ five‑star reviews on Checkatrade and Which? Trusted Trader praise faster, quieter heating after our powerflushing. Using professional Proflush equipment, McGrath Heating Services Ltd removes sludge, rust and debris from radiators, pipework and boilers to restore flow and heat distribution across the home. Our Gas Safe registered engineer — Paul — protects new boilers and helps preserve manufacturer warranties, leaving a full service report. Serving Blackheath, Greenwich and SE London for 26 years, we combine manufacturer accreditation with clear, honest communication.
Our Process
How It Works
Survey & Checklist
A Gas Safe engineer inspects radiators, valves, pipework and the boiler. We log cold spots, sludge build-up and note any system restrictions before quoting.
Proflush Circulation
We connect Proflush kit and circulate powerful, controlled flows with cleaning chemicals to dislodge sludge, rust and magnetite — flushing until return water runs clear.
Finish, Inhibitor & Report
System is refilled with a long‑life inhibitor, air‑bled and balanced. You receive a written report, before-and-after notes and advice to keep the system clean.
Benefits
Why Choose us for Powerflushing?
Restore heat and reduce cold spots
Powerflushing clears trapped sludge and debris so radiators heat evenly and boilers run more efficiently, improving comfort across Victorian and modern properties alike.
Protect new boilers & warranties
We use Proflush to meet manufacturer requirements and help safeguard Baxi and Vaillant warranties when upgrading a boiler, reducing the risk of early failure.
Accredited, local Gas Safe engineers
Gas Safe registered, Baxi Approved and Vaillant MasterTEC accredited engineers with 26 years' experience and 95+ positive reviews — reliable, safe and thoroughly documented.
What we remove: Powerflushing targets magnetite (black iron oxide), rust, pipe scale and other debris that builds up in older systems and new build networks that have never been cleaned. Left untreated this sludge blocks radiator flow, causes noisy boilers and can trip modern pump and TRV safety controls.
How we work: We use professional Proflush equipment to circulate at controlled flow rates and temperatures. The process includes an initial system survey, a mechanical flush with specialist cleaners, repeat flushing until runs are clear, fitting or checking magnetic filters where needed, then refilling with long‑life inhibitor and a full handover report.
Local, trusted and insured: McGrath Heating Services Ltd are Gas Safe registered and Which? Trusted Trader approved, with over 26 years serving Blackheath, Greenwich, Charlton and surrounding SE London postcodes. For advice or to book a survey call 07812 739696 or email info@mcgrathheatingservices.co.uk. We’ll explain if your system needs a powerflush now or if targeted repairs will do the job.
FAQ
Frequently Asked Questions
Powerflushing is a professional high‑flow cleaning of your central heating system using chemicals and a Proflush unit to remove sludge, rust and debris. It’s recommended for systems showing cold spots, noisy radiators, frequent pump failure or when installing a new boiler to protect warranties.
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