(descriptions from KAMCO
Power Flushing website)
Flushing is 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 such as FX2 and HYPER-FLUSH,
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, in conjunction with SYSTEM PRE-CLEAN, 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
It is prudent to power flush a heating system immediately
before fitting a new boiler to an existing system to prevent
possible future problems. Many systems are found to contain
corrosion and sludge, even if no flow problems have yet shown
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. 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.
CLEARFLOW® POWER FLUSHING
The CLEARFLOW power flushing process is a versatile, easy
to use and highly effective method of flushing heating systems.
By utilising CLEARFLOW system flushing pumps, heating systems
can be purged of sludge, scale and corrosion deposits with
minimal dismantling and disruption.
HOW DOES IT WORK?
The CLEARFLOW 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 CLEARFLOW 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 and reinstatement of the system to normal
operation takes only a few minutes.
System flushing will not remedy design or mechanical faults,
which should be rectified, but in many cases it will cure
the problems caused by these.