24/09/2023
In accordance with Part L of the Building Regulations we are now required to test for water quality as part of every annual boiler/central heating service we carry out. This includes checks for concentration of chemicals and water cleanliness.
Over time, radiator sludge builds up in your central heating system from an unavoidable mixture of rust, dirt and scale. This thick gloop sits at the bottom of your pipes and radiators which stops the water running through your system properly and your radiators from heating up efficiently. To combat this inhibitor chemicals are used. The chemicals in the inhibitor work together and the chemical reaction breaks down the sludge in your central heating system and protects it from building up again.
Inhibitor chemicals are an important component for heating and here’s why… Central heating inhibitor is the heating equivalent of a stage director. It works behind the scenes and plays a very important part in keeping everything running smoothly. However most people aren’t really sure what inhibitor is, what it does or the disasters it can prevent. In fact, it is so crucial to a well performing heating system that most boiler manufacturers state that your warranty could be invalid if your central heating doesn’t have the correct inhibitor levels.
So what is central heating inhibitor?
Central heating inhibitor is a chemical liquid used to protect your central heating system and keep it working efficiently to prolong its lifespan. Inhibitor is made up of a mixture of potassium tetraborate tetrahydrate, disodium molybdate, sodium nitrate and 2,2′,2”-nitrilotriethanol. It is usually clear or a pale yellow colour and must be stored in its original container in a cool well-ventilated place away from direct sunlight.
Is inhibitor necessary in central heating?
Not only does radiator inhibitor ensure that your radiators and pipes are in good shape, but it is a crucial part of protecting your heating system and could also save you maintenance costs on repairs for issues that inhibitor could have prevented. Also, as we mentioned earlier, your boiler warranty may even be void if you don’t use inhibitor because it is an essential part of a fully functioning central heating system.
The first thing that manufacturers are required to do upon a warranty call out is take a water sample…if this isn’t up to current standards in relation to inhibitor dosage then the warranty is invalid and you’ll be left with the repair costs out of your own pocket.
The pictures show the water quality testing kit used on a boiler service we recently carried out on a boiler that wasn’t installed by us but was still under the manufacturer’s warranty. As you can see from the initial readings…the lack of central heating inhibitor would have meant that the boiler warranty was invalid even though the customer was keeping up to date with the servicing. With the customers approval, we added the inhibitor chemicals there and then which meant that the manufacturer’s warranty remains valid.
So make sure that your engineer is testing for central heating water quality on an annual service or you may as well be throwing money down the drain.
Alternatively, you can contact us for your annual servicing and we can show you how well protected your system is and bring things up to full efficiency if you’d like us to. 😊😊