WHAT IS POWERFLUSHING?
Powerflushing is a process by which heating systems are cleansed using water at high velocity, but low pressure, so that no physical damage is caused to the system. The process is made even more effective with the addition of powerful cleansing chemicals.
The objective is to restore systems with circulation and boiler noise problems (caused by sludge and corrosion deposits) to optimum operation. Power flushing removes these deposits and the problems that they cause.
Power flushing is also an excellent way to pre-commission new heating systems, to remove excess flux, swarf and other debris, and the grease and oil used to prevent the rusting of components before use.
It is essential when fitting a new boiler to an existing heating system to powerflush 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/piping and the increased efficiency of the new boiler, and may then accumulate in the boiler heat exchanger, causing noisy operation, reduced efficiency and, in extreme circumstances, failure of the boiler (usually resulting in the manufacturer's warranty being invalidated).
HOW DOES IT WORK?
On arrival the whole system is put into operation and each radiator is checked using an infra red thermometer to determine were the problem areas are. The power flushing machine is connected into the heating system, either across the circulator pump couplings or across the tails of one radiator.
A preliminary flush is carried out to remove all circulating sludge and debris from the system. This is followed by adding a chemical cleanser to the system and allowed to circulate around the system for upto 2 hours. The powerful flow, combined with instantaneous flow reverser device, will dislodge and suspend deposits and corrosion which resist traditional system cleaning methods.
A Magnaclean powerflushing filter is also used to remove circulating black iron oxide contamination from the flushing water quickly and simply. Using the power of magnets it attracts magnetic iron oxides away from the water flow.
The cyclone construction directs contaminated water through a high power magnetic field, such that even the smallest of particles are retained on the central magnets, from which they are cleaned during and after the power flushing process. Larger particles, which may otherwise lead to blockages in small bore pipework, are also prevented from re-entering the heating system.
Once the corrosion and sludge deposits have been loosened and mobilised, a third and final flush is completed using fresh clean water which is forced through the heating system, pushing the remaining 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 powerflush machines pump through each radiator separately. An electronic vibraclean radiator hammer is used to vibrate each individual radiator, this helps loosen any remaining sludge or debris in the bottom of the radiators to ensure they are completely clear
At the end of the flushing process, the system contains fresh clean water.
Inhibitor is then added to the system to give long term anti-corrossion protection.
Each radiator is checked for TDS (totally dissolved solids) levels, which must be within 10ppm of the property tap water.
On completion a Powerflush certificate will be issued to show the system has been powerflushed to BS 7953-2006
System flushing will not remedy design or mechanical faults, which should be rectified, but in most cases it will cure the problems caused by these.