Frequently Asked Questions
A selection of common questions from our clients regarding Hadex® and its application, shelf life, dosage etcetera.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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
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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.