Powerflushing Heating Systems – The Low-Down

May 18, 2010 / by Barry Reynoldsboiler, london plumbersno comments

As hot water and heating systems get older they are prone to a build up of dirt and debris that sits in either the pipe-work or radiators and can restrict the flow of water around the system generally.

This can cause all sorts of problems such has uneven flow around certain areas of radiators in your property or huge cold spots on radiators where the circulating water goes around the edges of the radiator and don’t have an easy path through the centre because of the blockages.

If the system is full of sludge then the pump will be straining to push the water around correctly and will eventually fail. Boiler heat exchangers can also become very badly ‘furred up’ as a result and in extreme cases thin can result in the boiler being replaced completely.

Typically Powerflushing takes around a day and doesn’t involve taking the radiators physically off the walls.

Powerflushing machines attach onto the pipe-work and each individual pipe run to a radiator is turned off except for the one you’re intending to flush. This pipe-work has water and a cleansing agent forced through it at considerable pressure in both directions, typically the water in the flusher goes black very quickly as the deposits are extracted and then dumped into the reservoir.

Once the flushing has been carried out on each required radiator and the hot water cylinder indirect loop then the system is drained and then refilled with cold water.

The system is bled of all air & then tested for heat transfer around the circuit. Any immediate problems are resolved then.

The final drain down and refill allows for a chemical ‘inihibitor’ chemical to be inserted into the system to prevent the build up of debris in the future.

Powerflushing typically costs around £400 or more, depending upon the number of radiators.

For more information or advice contact these Plumbers in Chelsea

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