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Power
Flushing Central Heating Systems. |
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The core component of a heating
system is the boiler. When a
boiler is renewed, the boiler
Manufacturers Benchmark scheme
requires that the system be
thoroughly cleansed to British
Standard BS7593 with reference
to the interim DWTA industry
standard. Currently, best
industry practice is considered
to be to Power Flush the system.
Power
Flushing is the fastest and most
effective way to flush heating systems
and involves minimal disruption and
dismantling.
We use
purpose-built power flushing pumps
designed to cure the circulation and
boiler nose problems caused by
accumulation of sludge, corrosion
deposits and scale that are found in
most aging central heating systems.
The power flush pump is
temporarily connected into the
heating system during the
flushing process. The high water
velocity combined with
instantaneous flow reversal
dislodges and mobilises sludge
and corrosion deposits. After
loosening the debris, the pump
expels it from the system to
waste using a high velocity flow
of fresh water. |
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Radiators are individually flushed
without removal or disconnection
from the system. After the power
flush, the system is full of clean
water and restoration to normal
operation occurs after a few
minutes.
A power flush can be extremely
effective in cleansing systems with
corrosion problems as a result of a
design fault but we would strongly
recommend that any such design
faults be rectified before power
flushing commences.
The
success of a power flush will depend on
the level of heating system corrosion
that has taken place. This process will
cure most circulation problems but
cannot undo corrosion and gradual decay
that has culminated in the need to power
flush in the first place.
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Although it is very rare for a
heating system to experience leaks
after a power flush, it is not
possible to inspect a system
internally beforehand and the need
to use a flushing and dispersing
chemical for effective cleaning
means occasionally, we may find a
leak. The advanced stage of
corrosion causing such a situation
means that the leak is likely to
occur imminently - even without a
power flush. In this is the case, we
are sure you would agree that it
would be more preferable that this
should happen while we are on site
rather than at the weekend or while
the premises are unoccupied.
Systems that have been neglected
over a period of time or have not
been treated with an effective
corrosion inhibitor may have
severely compacted corrosion debris
- in the pipe-work, radiators and
boiler. It is possible that even
after a power flush, some radiators
may still not be totally effective
or boilers nearing point of failure
may cease working altogether due to
sludge and debris breaking loose and
collecting the heat exchanger.
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