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CHEMICAL FLUSHING PROCEDURE – WHICH CHEMICAL TO USE
Which chemical to use? POWERFLUSH FX2, or HYPERFLUSH.
Both of these chemicals will remove sludge, and POWERFLUSH FX2 will also remove scale from the heating system.
POWERFLUSH FX2
Use POWERFLUSH FX2 when:
~ You consider the system to be heavily sludged,
although basically sound and in reasonable condition.
~ There are no aluminium heat exchangers or radiators
present in the system.
~ The system does not have elderly galvanised steel or
stainless steel pipework installed during the 1960s copper
shortage crisis.
~ You consider that there may be limescale deposits
present in the boiler or system.
How much to use?
2.1/2 litres per ten radiators (or a little more if you
consider the system to be heavily sludged).
Where and when to add POWERFLUSH FX2?
Into the pump tank whilst power flushing, but not
beforehand.
Temperature required?
POWERFLUSH FX2 may be used cold (necessary when
changing a boiler), but works faster with temperature.
The very high flow rate of the pump means that during
power flushing it is not necessary to work at
temperatures above 60°C.
NEVER LEAVE POWERFLUSH FX2 IN A SYSTEM
Use both HYPERFLUSH and POWERFLUSH FX2 if you consider the system to be heavily fouled.
Add HYPERFLUSH on a prior visit up to 14 days before the power flush, and ask the householder to leave the system
running as hot as possible.
Use POWERFLUSH FX2 as usual on the day of the power flush, adding directly into the pump tank.
Issue: May 2023
HYPERFLUSH
Use HYPERFLUSH when:
~ The system contains aluminium radiators or heat
exchangers.
~ You consider the system to have suffered severe
internal corrosion and metal wastage.
~ The system has elderly galvanised steel or stainless
steel pipework installed during the 1960s copper
shortage crisis.
How much to use?
500ml per ten radiators (or 2 x 500ml if you consider the
system to be heavily sludged).
Where and when to add HYPERFLUSH?
Into the system 3-14 days prior to power flushing (via the
feed & expansion tank, or a SYSTEMSURE injector unit),
Directly into the pump tank whilst power flushing.
Temperature required?
HYPERFLUSH works best at higher temperatures, and
when used to pre-treat a system, it should be operated as
hot as possible.
However, the very high flow rate of the pump means that
during power flushing it is not necessary to work at
temperatures above 60°C.
Section B – Using the Clearflow pump
Page B.6
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