• Stu Clark

What is the new BS 7593:2019 and what does it mean for you

Updated: Oct 12, 2019

If you haven't heard already there has been a new British Standard in the revised building code of practice for preparation, commissioning and the maintenance of domestic central heating systems.


The standard is designed to improve the adoption of best practice when it comes to central heating health and boiler protection.


The new BS 7593:2019 is broken down into five stages: clean, guard, protect, maintain and test.


1. Cleaning your central heating system.


Before altering anything on the central heating system, such as a new boiler, central heating filter, radiator or hot water cylinder it's now required that the system is cleaned. This is done by using a power flushing kit and chemicals to clean out the sludge and debris within heating system.

Not only is this now a new requirement with the British Standard code of practices but it is also required by most boiler manufacturers to validate the warranty of the boiler.


2. Guard the central heating system against harmful substances.


Once the central heating system is cleaned you'll want to guard it from filling back up with the sludge and debris you've just paid to have removed. To do this you'll need a central heating filter that collects the particles flowing around the system and securing it until it is removed periodically.

It's recommended to having the filter installed on the return pipe connecting to your boiler to stop any harmful magnetite or sludge and debris from entering the boiler and damaging the pump and heat exchanger.


3. Protecting your central heating system with chemicals and more filters.


To protect your central heating system from corrosion and scale you add an inhibitor, but most systems don't have the right, or it's diluted over the years and never replaced. The average 500ml bottle of central heating inhibitor protects 15 single panel radiators, or 125 litres of water within your central heating system. So make sure you've worked out how much your system will require.

On top of having a central heating filter if you live in an area with high limescale within the water then it's recommended to get a limescale filter fitted on the incoming main to reduce the build up of limescale which won't get picked up with a magnetic filter.



4. Maintain your boiler and central heating system. This is essential!!


Every year you should be getting your boiler serviced. This ensures that it is running correctly and efficiently. Included in a boiler service should also be the cleaning of the central heating filter and topping up of the central heating inhibitor chemicals. This ensures the filter is working to its maximum capacity and that the central heating water is treated with the right amount of chemicals to continue reducing the build up of limescale and other system debris.



5. Test the water quality in the heating system.


Again, this should be done at the same time as a boiler service but it should also be tested further every 5 years by sending a water sample away to get tested. As well as that, every 5 years the system should be drained down and filled up with clean water and central heating inhibitor. If the test comes back negative it is recommended that another central heating power flush is done to clean the system out again and keep it working well.


If you follow all these steps you'll increase the life of your central heating system, meaning it will last longer before having to buy a new boiler, cylinder or radiators. No sudden leaks due to internal rusting of components, no expensive repair bills. Increased efficiency also means reduced energy bills.



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