Frequently Asked Questions
A selection of common questions from our clients regarding Hadex® and its application, shelf life, dosage etcetera.
Can Hadex be used to prevent or combat Legionella?
Yes, in order to do so please follow our “shock treatment” procedure. For further support, please contact our water quality department.
How can I add Hadex to my water supply in the most effective way?
Hadex® can be added to your drinking water supply manually or by automatic dosing with either a dosing unit or inline measuring equipment.
In which conditions do I need to store my Hadex supply in order to ensure its maximum shelf life?
Hadex® should be kept indoors, in a cool and dry (dark) area. If stored at temperatures below 25°C, it can be stored for up to 1.5 years without losing its effectiveness. If stored in really cool termperatures (t = < 6 °C) it will even keep for up to 3 years.
Is Hadex expensive?
1 liter of Hadex® can be used for 50.000 liters of drinking water, which translates into 0.5 cents per liter. In terms of disinfection, Hadex® is therefore a much cheaper alternative for ATA or CTGB approved biocides such as peroxides, as the Hadex dosage is much lower.
Is it possible to combine a UV installation with Hadex chlorination?
Hadex® will be slightly less effective (fotolyse) when combined with UV systems. In a UV system, dosing and energy values are relatively low, so this loss will hardly be measurable. Read more about our UV systems on the related product page.
We’re not measuring any Hadex concentration in the water at our tap points; how is this possible?
Different scenario’s may be possible here. For example, you may be measuring incorrectly, or active coal filters may have absorbed the Hadex® fluids in your water. Please also check the Hadex® can you've used: has it perhaps passed its shelf date? If you're unsure, feel free to contact us with your questions, so we can help and advise you.
We’ve added Hadex to our water supply, but now our vessel smells like a swimming pool! What have we done wrong?
What may well be happening here, is that your fresh water supply was severely fouled and Hadex® is reacting accordingly. Due to this strong action, a chlorine smell may be released which you could associate with a swimming pool scent. In this instance, it is imperative you do not adjust your Hadex® dosage! We advise you to continue the treatment; the typical smell will decrease eventually.
However, if you suspect you may have used the wrong dosage and added too much Hadex®, then please contact us for advice.
What is the time limit for returning Hadex?
Hadex® should be returned within three months of the production date. This date can be found on the label at the back of the packaging.
Where can I find an overview of Hadex stockpoints?
Click here to visit our Where to buy page, with information about our worldwide stock points
Can I please speak to Mr. Hadex?
A common mistake! However, Hadex® is not a person but a Hatenboer-Water brand-name for our water disinfecting product.