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Fernox says engineers should prepare for changes to Part L

Water treatment manufacturer Fernox is calling on heating and plumbing professionals to ensure that they are implementing the best practice guidance outlined in BS 7593:2019 – before it becomes mandatory. The code of practice is due to be introduced into Part L of the Building Regulations in June 2022.

Approved Document L of the Building Regulations, which looks at the conservation of fuel and power, is being updated to include additional measures that will help to keep central heating systems working at optimum efficiency, thereby reducing carbon emissions and fuel wastage. The changes include ensuring an in-line filter is installed, checking inhibitor levels on site annually and conducting laboratory analysis of the system water, or re-dosing, every five years.

Fernox recognises that many tradespeople will already be taking steps to correctly clean, guard, protect, maintain and test central heating systems – but is encouraging engineers to carefully consider the water treatment products that they are using. To make compliance as quick and easy as possible, Fernox offers a wide range of solutions that can help to improve engineers’ on-site productivity and efficiency at every stage of the commissioning and maintenance process.

Richard Crisp, Head of Chemistry at Fernox said: “The Fernox range of water treatment products has been designed to offer engineers an effective, easy to use solution for every task. For example, our chemical water treatment range comes in 265ml, 500ml and Express 400ml versions to suit a wide range of systems, and all chemicals can be safely used in conjunction with each other for full protection. In addition, we have designed our TF1 range of in-line filters to be quick and mess free to install and clean and we offer handy on-site and laboratory testing kits. With the Fernox range, engineers are equipped to adhere to the latest regulations and protect and maintain central heating systems long-term.”

The new measures outlined in Approved Document L of the Building Regulations are set to come into effect from 15 June 2022.

To find out more about Fernox and its range of water treatment products visit:

13 April 2022


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