You might find the
sound of a boiling kettle to be pleasing, but imagine getting the same sound
from you boiler. It’s going to be no less than an irritating alarm. A kettle
boiling sound emerging from a boiler could be settled down to something called
What is kettling in a boiler?
For initials, a boiler
operates to heat water by using a heat exchanger. In case of hard water, the
proportion of lime (calcium salts) is comparatively more which eventually gets
build up on the heat exchanger and restricts the flow of water. As the water
gets heated, the salt, being insoluble, settles at the bottom of the container,
restricting the water flow that eventually results into the boiling which
therefore expands and creates noise.
Kettling can also come
up as an outcome of a number of other causes including the inappropriate
installation of the boiler, a leak in your boiler system or in case of the
boiler overheating/ faulty thermostat. A boiler with a faulty thermostat can
prompt the system to overheat and result into kettling or a banging noise from
the pump that has been stuck. In that case, replacing the thermostat might be
the only option left to be followed upon.
A leak in the boiler
system is another important cause of a boiler kettling. That leak could be
close to the boiler system or might be throughout the pipework in your home.
The cause of this leakage could be anything from a poorly installed pipework, a
general corrosion over time or the pressurization of the vessel.
Each of these reasons
can be classified as chemical and mechanical factors, with the chemical factors
taking away the foaming and deposits in the system and mechanical factors
taking gas burner pressure, flow rate settings, thermostats, system design and
casting faults into consideration.
But, on a clear note,
this would not result into the boiler exploding because these systems, for
instance come with a number of safety controls that are installed in order to
kick in and lock the boiler out before the occurrence of any such problems.
While looking forward to the cause of the lock out and diagnosing the heat
exchanger to get you out of the problem, is a matter of much greater importance
that should be carefully considered by the plumber.
Learning about the
kettling and its occurrence would give rise to an obvious question, as in how
to stop kettling in a boiler?
How to stop kettling in the boiler?
As already mentioned
above, the occurrence of kettling in your system can be an outcome of a number
of reasons. Different problems have different solutions and we have mentioned
the solution to every cause of your boiler kettling.
FIXING A LEAK- A
system that has not been treated for a period, might have existing leaks that
can temporarily be plugged with corrosion debris. If the leak is external and
is caused by a failing seal on a pipe or a joint, than it might bring itself
into a simple repair cost but if in case the boiler is leaking from within,
then this might create a possibility of the parts corroding from inside, thus
making it a much complex issue. This also might lead you way to expensive
repairs or replacing the boiler permanently.
BUILD UP- Well, talking about the systems that are less than 10 years old, an
acid based cleanser can be used in order to remove the deposits in the system.
For instance, an acid based cleanser can selectively dissolve the scale
deposits without attacking the metals present in the central heating systems.
While, the older installations can be improved by dispersing the buildup and
removing the sludge deposits. Henceforth, a chemical clean will use high
strength solutions to corrode the debris in your heating system.
STOP A BOILER
OVERHEATING- In case of a faulty thermostat, you are highly recommended to
consult your boiler manual for the follow up on how to reset your device. In
case if the system still creates a problem, consult you technician for
professional help and better results.
have mentioned some of the sum-up examples of what can be done to fix the