Chemical Flush Process

What is a chemical flush?

A chemical flush uses gravity to empty and refill the system adding appropriate chemicals to suspend, disperse and remove accumulated materials. After this process, the system is given a final flush with clean water and chemical inhibitors are added to protect the system.

Why might my system need one?

Symptoms such as cold patches at the bottom of radiators, parts of a system that no longer heat correctly, or odd noises produced by the boiler once it heats up, can all indicate a chemical flush treatment is needed. A treatment will boost the effectiveness of your heating system and with an inhibitor added to central heating regularly during its annual service, protect it from rust and scale, and prolong its life, saving you money in the long term.

Who requires that a system be chemically flushed?

Boiler manufacturers require it as the minimum standard required, and legislation and best practices recognise that in order to effectively clean a system, a chemical cleanser ought to be used.

How often is it recommended that a system is chemically flushed?

A correctly maintained heating system which is regularly treated with a corrosion inhibitor, should work efficiently for a number of years. In general, heating systems will only require a chemical clean when the heating engineer indicates it is necessary, as the kind of debris and the amount will depend on the type of system, its age, and how well it has been maintained. You should be aware however, that new systems can easily succumb to debris during after installation.

How long does it take?

A few hours depending on system size and amount of debris

We have used Merretts for 9 years to service our boiler. Engineers always arrive within the promised time, and are always professional. John is a very tidy worker with good communication. Very happy with the service.

Mr S – Winstone

We recently had to renew the semi commercial oil boiler in our house. Merrett’s Heating Services worked with us to replace it at the most opportune time, with the minimum disruption and mess. We are absolutely delighted with the result; the boiler is quieter, more efficient and has saved us about 30% of our average oil usage. Well recommended

Mr P – Frampton on Severn

No doubt you are aware what an ambassador John Green is for your company. John has been servicing our Rayburn for over 10 years and his fault finding which has recently been at the fore and his diligent approach to his work has not diminished, he continues to work to the highest standard. He is also willing to pass on any tips to help keep ones Rayburn running efficiently.

Mrs S – Gloucestershire

No doubt you are aware what an ambassador John Green is for your company. John has been servicing our Rayburn for over 10 years and his fault finding which has recently been at the fore and his diligent approach to his work has not diminished, he continues to work to the highest standard. He is also willing to pass on any tips to help keep ones Rayburn running efficiently.

Mrs S – Gloucestershire

We have always used Merretts Heating for our boiler service and plumbing as we know they will turn up, do a good job so we dont have to keep getting them back and they always leave things clean and tidy afterwards

Mr S – Whitminster

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