How long does a power flush take?
A power flush typically takes 6–10 hours for an average London home with 10 radiators. Larger properties or heavily silted systems can take a full day.
How Long Does a Power Flush Take?
A professional power flush takes 6–10 hours for an average London home with 8–12 radiators. Here are more specific estimates:
Time by System Size
| Property / Radiators | Typical Duration | |---------------------|------------------| | 1–2 bed flat (6–8 rads) | 4–6 hours | | 3–4 bed house (10–14 rads) | 6–10 hours | | 5+ bed townhouse (15+ rads) | 8–12 hours | | Heavily silted system | Add 2–4 hours |
What Takes the Time
- Connection and system flush — flushing the full circuit with chemical cleanser
- Individual radiator flushing — each radiator isolated and flushed in turn
- Reverse flushing — water direction reversed to dislodge stubborn deposits
- Inhibitor dosing and testing — final water quality check
- Magnetic filter fitting — recommended at the end of every power flush
Can You Stay at Home?
Yes — the heating is off for most of the day, but you don't need to vacate. Our engineers work efficiently and tidy up fully.
RARE Power Flush Service
We cover all London postcodes including W1, SW1, NW3, SW3, SW7 and beyond. Call 020 7458 4949 to book.
Related Service
Power Flushing London
Expert engineers across prime London