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If like most people these days you have central heating fitted within your property that uses radiators,
then the chances are you are going to need the power flush at some time.
One of the first things you will notice is the radiators take a little longer to heat up than they use to,
if you find a radiator always needs to be vented because it’s cold at the top and warm at the bottom.
When you vent the radiator you may notice that the water is very dark color,
your boiler may be noisy when it’s running.
When your central heating was first installed, it should have been flushed then to
remove all the excess flux and little bits of debris from within,
but if your system is over tens years old then this may have been overlooked.
Flushing the central heating system when new has always been advised by the boiler manufactures,
Now we have what is known as a benchmark, this is a list of procedures that the installer has to follow.
With ever boiler come’s a benchmark book; it maybe located at the back of the boiler installation book.
This benchmark book has to be filled in by the installer, and signed and dated.
You can flush with just water for a new system, or you can use a flushing chemical.
Once a system has been flushed out, then an inhibitor should be added to
prevent any sludge build up within the system.
This inhibitor should be checked every year,
IE when you have your annual boiler service, to see if it needs to be topped up.
If you drain the system down for any reason or even just remove a
radiator for decorating then you will need to top the inhibitor up.
With a power flush you are removing all the sludge build up within the system,
The answer is, the water that we fill the system with has many impurities within it.
Yes it’s the same water we drink from our tap, also you have many different types of metal within the system,
IE steel, cooper, brass, cast iron and soon. All these metals react with one another within the water.
This is what causes the sludge build up. It does not take long for this to start happening.
My reason for this is over the years I have worked in this industry,
I use to use a power-flushing machine, but I found that it could also cause
leaks on the system, normally on a radiator.
After speaking to the makers of the power flush machine,
they told me that if a system was over tens years old then you
have a one in ten chance of a leak appearing in a radiator, this is because the sludge lodges in the
water ways of the radiator and starts to corrode the radiator,
so when the sludge is removed it can leave a small pinhole leak.
I use a chemical call system restorer, you add this to the system via the header tank,
or if you have a sealed system then you will need to drain
some water off then add the chemical through a radiator.
Once you add this you will need to run the system for around 24 hours for it to start cleaning.
Depending on the make of chemical you use you can leave it in the system, you don’t have to drain it off.
I use a chemical that can stay in the system, so it’s always cleaning;
it lasts for around 24 months. You can also add the inhibitor to work along side it.
you will also notice a small difference in your gas or electric bill as the
boiler once clean does not have to work so hard to heat up your radiators.
to check your system for sludge build up, it’s easy to check.
I always tell my clients to look after their boiler and the boiler will look after them. It’s just like a car,
if you never have it serviced or checked it will let you
down when you need it most, that’s the same with your boiler.
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