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The importance of inhibitor in heating systems

Are your inhibitor levels correct graphic

Inhibitor is an essential part of a heating system that most people are unaware of or unsure of the role it plays in making your heating system work effectively. The key role of inhibitor is to protect your heating system from the build-up of sludge in pipes and radiators.

Central heating inhibitor is so important that your boiler’s warranty (in most cases) could be invalid if the inhibitor levels are incorrect.

What is inhibitor?

Inhibitor is a chemical liquid used to protect your heating system. Its main job is to help pro-long the life span of the system and to keep it working efficiently. It is often a clear/pale yellow coloured liquid and is a mixture of potassium tetraborate tetrahydrate, disodium molydbate, sodium nitrate and 2,2’,2”-nitrilotriethanol.

But how does it do it?

As time goes on sludge builds up in pipes and radiators. This is due to unavoidable rust, dust and scale that sits at the bottom of your pipes and radiators. If inhibitor level is too low, over time this sludge can act as a dam – preventing water from running through the system effectively and stops radiators from heating up efficiently. The inhibitor prevents this build up from happening, causing a chemical reaction with the sludge to break it down and protects the system from any future build ups.

Why is it needed?

Having rust and dirt in your system for a long period of time is never good. It can cause corrosion to your metal pipes and radiators, leading to potential breakdowns in the future. Therefore, keeping the right level of inhibitor could save you money on maintenance and future breakdown costs. 

How do I know if my inhibitor level is too low?

During a service of your commercial heating appliance, GlenFarrow can carry out an inhibitor test on your system to make sure your system has the correct level and add inhibitor if required.*

How long does inhibitor last before it needs changing?

Inhibitor dilutes in a central heating system over time and can no longer provide enough protection against the build-up of sludge and rust. The life span of inhibitor is dependent on many factors – that’s why we recommend to get your inhibitor tested every year with your annual service.

If you would like to find out more about our commercial servicing packages, get in touch here.

*This will be at an additional cost to the service