The Fernox Express Inhibitor Test is available from all major merchants and online plumbing retailers. For country availability please refer to the article below.
For a more convenient purchase, you can use the Stockist Finder on our website to locate a retailer near you.
On-site water testing countries & availability
The table below shows the availability of each Fernox water test in different countries. Please note that our test availability is currently limited to certain countries as we transition our apps to provide you with an even smoother experience. We appreciate your patience during this process. Rest assured, we are working hard to expand our service to more countries and add additional test types in the near future.