How Often Should You Power Flush Central Heating?

How Often Should You Power Flush Central Heating?

how often should you power flush central heating

We’re often asked how often should you power flush central heating systems?

The answer isn’t too straightforward as you do have to consider some other factors such as;

  • When was the last time it was power flushed?
  • When was the last time you had inhibitor added to your central heating?
  • Is your boiler serviced regularly?
  • Do you live in a hard water area?
  • Do you have a central heating filter installed?
  • If so, when was the last time it was cleaned out?
  • Is there already signs of rust on your radiators?

Lets Answer These Questions To Give You An Idea of How Often You Should Power Flush Central Heating


When Was The Last Time Your Power Flushed Your Central Heating System?

If you have no record of the last time your central heating system was power flushed then I would suggest arranging one straight away. Ignorance is sometimes bliss, but in this case it could simply be a ticking time bomb. If you have no idea of when the last time was, maybe you’ve just bought the house and there is no record of it, or you’ve lived there for so long and you really can’t remember, it’s generally best to assume it hasn’t been done for some time, if at all.

There could be years of limescale, rust and magnetite sloshing its way around your radiators and boiler, slowly blocking valves, pipework and your heat exchanger. You won’t know this until you get a problem and then it could be an expensive repair or replacement.

When Was The Last Time You Had Inhibitor Added To Your Central Heating? – How Often Should You Power Flush Central Heating

Central heating inhibitor is a liquid that reduces the chemical reaction that occurs when water, iron and air combine. The iron oxidation process is what causes magnetite in your central heating. This is the brown/black sludgy substance that blocks valves and can damage your boiler.

A 500ml bottle will treat 125 litres or approximately 15 single panel radiators (depending on their size). This needs to be topped up annually and should be done at every boiler service. We know this is often not the case, so a regular check up to see if inhibitor is used is recommended.

If you’re interested in getting your water tested we recommend using Adey who produce in-house laboratory tests on your water samples to show you what is in your water and the likely problems your system could occur. Click on the link here to see Adeys water test kit (this will take you to a different website).

Is Your Boiler Serviced Regularly? – How Often Should You Power Flush Central Heating?

A boiler service is designed to ensure your boiler is working efficiently and is up to regulation. It is not a solution to a broken boiler and should only be done on a fully operating system.

Boiler servicing should be done annually by a Gas Safe registered plumber or heating engineer.

If you have no record of your boiler service then I would recommend getting one ASAP. It’s essential to have your boiler serviced regularly as this can reduce the risk of it breaking down and needing to buy a new one.

Do You Live In A Hard Water Area?

The definition of a hard water area is water that has a high amount of dissolved minerals, mainly calcium and magnesium. These minerals cause what’s commonly known as limescale which can be found around the edge of taps and shower outlets.

Hard water can erode from the inside out. So if you’re showing a small amount of rust on a radiator chances are it’s a lot bigger on the other side. It can also erode copper pipe, causing pinholes and leaks. Not only that but hard water can affect the lifespan of moving parts such as float valves, isolation valves and diverter valves.

To see if you live in a hard water area click the link here.

There are ways to reduce hard scale in your water system by fitting a scale reducer or water softener to your incoming mains.

Do You Have A Central Heating Filter Installed? If So, When Was The Last Time It Was Cleaned Out?

Firstly a central heating filter is a unit that is fitted to your flow or return pipe on your central heating system. It is a small box with a magnet inside which collects magnetic particles inside your central heating.

They come in all shapes and sizes, with some even connecting to your smartphone to tell you when it’s full or sensing a rise in magnetite.

Central heating filters should be cleaned out at least every 6 months as they can only hold so much and won’t function correctly if they’re not emptied. This process is very easy to do and most come with how to instructions but if you’re not confident you can always ask your plumber. If you can’t remember the last time it was cleaned out then I would recommend doing this straight away.

Are There Any Signs Of Rust On Your Radiators? – How Often Should You Power Flush Central Heating

As mentioned above, signs of rust on the outside of a radiator or pipework shows that there is already rust on the inside, potentially more than you can see that is damaging your radiators, pipework and boiler. If not treated this can cause a pinhole in your radiator or pipework which can cause a leak, or it can result in damage caused to your boiler.

So, How Often Should You Power Flush Central Heating?

The general recommendation is every 4-5 years, but that is if you have all of the above covered. If you don’t then you may need to schedule a power flush more regularly.

If you’re still not certain whether you should get your central heating power flushed then check this link out here which can show you how much money you could save each year on your heating bills alone. That’s not including the reduced risk of breakdowns, burst pipes and damage to your home.

If you’d like to arrange for your central heating power flush then contact us today.

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