Power Flush Hendon

Heating systems in Hendon homes

Much of Hendon was built out in the 1920s and 1930s after the Northern line reached Hendon Central, so there are many interwar semi-detached and terraced houses. Around Hendon Old Village and The Burroughs you’ll find older Victorian and Edwardian properties, and across the area plenty of larger houses have been converted into flats. With Middlesex University on The Burroughs, there’s also a good number of rented homes and HMOs where heating systems work hard and are rarely treated.

In interwar houses, heating has usually been added or replaced several times over the decades, so it’s common to find older steel radiators connected to a newer combi boiler, sometimes with sections of original pipework still in use. In converted flats, systems are often compact, with the boiler in a kitchen cupboard and radiators on short pipe runs — easy to flush, but prone to sludge if inhibitor was never added after the conversion.

Common heating problems we see in Hendon

• Mixed-age systemsNew combi boilers fitted to old radiators and pipework that were never cleaned — debris from the old system goes straight into the new boiler.
• Landlord and HMO systemsHeating systems in rental properties that have been topped up and repaired repeatedly, diluting inhibitor and letting sludge build up.
• Cold bottom-floor radiatorsIn split-level and converted houses, the lowest radiators often go cold first as sludge collects there.

Other signs to look out for include black water when you bleed a radiator, a boiler that bangs or “kettles”, and radiators that take a long time to warm up. Our guide to signs you need a power flush covers them in more detail, and if your radiators are cold in particular, start with cold radiators: causes and fixes.

Our power flushing service in Hendon

Every Hendon power flush follows the same thorough method we use across London:

1. We check the system and test the water to confirm a flush will help.
2. The power flushing machine is connected and cleaning chemicals circulated.
3. Each radiator is flushed on its own, with flow reversal and agitation.
4. Dirty water goes to drain until the system runs clean.
5. Inhibitor is added and the system recommissioned and checked.

Read the full detail on our power flushing service page, or see what affects the cost of a power flush. If you’re about to replace your boiler, see power flushing before a new boiler.

Booking a power flush in Hendon: practical details

Many streets near Hendon Central and Brent Street are in controlled parking zones, so it helps if you can let us know about parking or provide a visitor permit. In converted houses, we’ll need access to every radiator in your flat and to wherever the dirty water can be drained — usually an outside gully.

On the day, the heating and hot water will be off for most of the working day. It helps to clear space around the boiler and radiators, and to tell us about any radiators that are hard to reach.

Areas near Hendon we also cover

• Brent Cross
• Colindale
• Mill Hill
• Golders Green
• Finchley
• West Hendon

See all the areas we cover across London.