Power flushing
Power Flushing
Power flushing is an expression used to denote the process by which heating systems are forcibly cleansed using water at high velocity, but low pressure, so that no physical damage is caused to the system.
The process can be made even more effective with the addition of powerful cleansing and mobilising agents.
The objective is to restore a system with circulation and boiler noise problems (caused by sludge and corrosion deposits) to optimum operation. Power flushing removes these deposits and the associated problems they cause.
Power flushing, in conjunction with a system cleaner, is also an excellent way to pre-commission clean new heating systems, to remove excess flux, swarf and other debris, and the grease and oil used to prevent rusting of components before use.
It is prudent to power flush a heating system immediately before fitting a new boiler to an existing system to prevent future problems. Many systems are found to contain corrosion and sludge, even if no flow problems have yet shown themselves.
Existing debris is often mobilised by alterations to the system pipe work and may then accumulate in the boiler heat exchanger, causing noisy operation, reduced efficiency and, in extreme circumstances, failure of the boiler. The high efficiency and compactness of modern boilers, developed to minimise fuel costs and pollution, means that they are more susceptible to problems caused by debris in the system water.
How Does it Work?
The power flushing pump is simply connected into the heating system, either across standard circulator pump couplings, across the tails of one radiator, or wherever most practicable. The powerful flow, combined with instantaneous flow reverser device, will dislodge and mobilise deposits and corrosion which resist traditional system cleaning methods.
Once the corrosion and sludge deposits have been loosened and mobilised, fresh clean water is forced through the heating system, pushing the contaminated water out through a full bore dump valve to waste. During the process, radiators are individually flushed, without removing or disconnecting them from the system, by directing the full output of the pump through each radiator separately.
At the end of the flushing process, the system contains fresh clean water; an appropriate inhibitor is then added to protect your boiler and radiators by preventing future corrosion and reinstatement of the system to normal operation then takes only a few minutes.
Blue Flame Heating Solution’s power flush operatives are trained to a standard exceeding BS7593 (see below) If your central heating system shows any of the problems above contact us for advice.
Power flushing costs less than you think so call us today for a quote 01382 84 83 84
Scope
This DWTA (Domestic Chemical Water Treatment Manufacturers Association) Code of Practice gives industry approved recommendations on good practice in respect to cleaning and inhibiting of domestic hot water central heating systems. From 2006, this will be a requirement under the Building Regulations for England and Wales, Part L., 2006. The regulations stipulate that cleaning and inhibiting is necessary when installing new central heating systems or carrying out remedial work on existing central heating systems.
These measures have been introduced to minimise scale and corrosion formation, which have been demonstrated to lead to a reduction in energy efficiency of the system over time.
This Code of Practice builds on BS 7593: 1992 to incorporate modern cleaning and flushing techniques and methods
BS EN 12828 and BS EN 12831 Hot water central heating systems for domestic premises England, Wales, Scotland, Northern Ireland and Republic of Ireland
BS 7593: 1992. Code of practice for treatment of water in domestic hot water central heating systems
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