Frequently asked questions



100% Natural

Environmentally friendly

    1. Where can I buy or order the system?

    Click on Dealers, beside that you can order the system directly with us by sending an email to us at Free Shipping by UPS in Europe!!
    (when you should order, please give us your phonenumber because UPS needs it) 
    After payment, we will send you the Tank-O3 system by registered mail within 48 hours. 

    2. Who can install this system for me?

    The Tank-O3 system should preferably be installed by your supplier or maintenance company. They are technically specialized and can easily install the system by following  instructions from the included “instruction manual”.

    3. How can I keep the Tank-O3 system easily maintained?

    Unscrew the lid of the clean water tank. Fill a small bottle with a wide neck with cleaning vinegar or citric acid and you can simply immerse the electrolytic cell, still mounted on the tube, into the bottle. After approx. 10 minutes, remove the electrolytic cell from the bottle and dry the electrolytic cell with a cloth. Close the bottle with vinegar, ready for the next cleaning. It is that simple! For more information and photos, see cleaning tips.

    Alternatively: if expanded (at home) you can also use the extra tube of approx. 10 cm in length that was supplied with the Tank-O3 system. You can disassemble the electrolytic cell and attach it to this short tube. For example, you can put the electrolytic cell with the John Guest coupler for about 10 minutes in a small glass of cleaning vinegar or citric acid. In this way, you can clean the electrolytic cell anywhere and where ever you want. For more information and photos, see also cleaning tips.

    4. Red light, common problem, there is probably nothing wrong!

    If the cell nucleus is normally less than half a year old, take one of the following actions: 

    Sometimes the red light comes on. This means that a short circuit has occurred in the vulnerable electrical circuit (due to the minimum mA). This often occurs because the tube is not pressed on tightly enough and water enters the tube. This leads to a short circuit where the plug is inserted  into the electrolytic cell. 
    You can solve this short circuit by thoroughly drying both the plug and the inside of the electrolytic cell (by blowing). Put the plug back in the electrolysis cell and turn the plug up and down a few times so that the contact is properly restored. And od course now press the hose strong and well, good luck!

    When replacing the cell nucleus, the clip must be pressed firmly, so make sure that the ends of the clip are firmly attached. Press each leg of the clamp firmly onto a hard surface until you hear a click. Now the clamp is tight! If part of the clip is not properly secured, the red light will switch on. In that case, too little current flows to the electrolytic cell!

    All in all, this does not mean that the cell nucleus has to be replaced immediately. The cell nucleus lasts for a minimum of 8 to 10 months, thus for as long as a whole season. So first check carefully the above. Experience has already taught us that condensation can occur due to large temperature differences, especially when topping up with cold water in a warm environment. To prevent this, we advise  you to seal the hole above the lid with something like a wad of kitchen roll paper, right through where the electric wire passes. Good luck and prevent short circuits!

    5. Replacing the cell nucleus?

    For detailed information on how to replace a cell nucleus, we refer you to the next page Replacing the cell nucleus

    6. Where can I find the much discussed "how clean is the clean water tank" test

    At the end of 2016, the Netherlands Kampeerauto Club (or NKC, literally translated as the Dutch Camper Club) commissioned the test laboratory of water company Vitens - as an independent institute- to test a number of remedies or systems regarding the quality of water in the clean water tanks of campers. Click on how clean is the clean watertank to read about this test.

    7. Is this system only intended for motorhomes

    The system is marketed for motorhomes first but can also be used in caravans, Tiny Houses, boats and yachts, buses, trucks, horse trailers, service vehicles and other relatively minor applications.
    The system can be supplied tailor-made for all kinds of applications. Contact us for further details.

    8. Does the system only work on 12-Volts

    The system works based on 12 volts. We use an ozonecel with a single nucleus.
    In an installation of 24 volts, we have to make use of a 3- or 4-fold cell nucleus.
    A 24 volt system will only be supplied on request after mutual consultation!  

    9. Is ozone gas dangerous

    The amount of ozone gas produced by the Tank-O3 system is so small that it is absolutely harmless as long as there is an airflow (both in and out) in the water tank. Ozone gas changes back into oxygen after approx. 25 minutes, so with a good airflow, no accumulation of ozone gas occurs. And given the small amount of ozone gas that is produced, this gas will immediately and quickly dissolve in the ambient air.    

    10. Does Tank-O3 protect water against Legionella?

    Tank-O3 is the best legionella prevention system on the market. What many people do not realize is that the quality of the water in the clean water tank, especially at higher temperatures, rapidly deteriorates, resulting in contamination of water as well as in the tank and, in the worst case, a high safety risk of legionella contamination. All this is prevented by Tank-O3, without having to give it a second thought and without taking (necessary) actions.

    11. Can I install the system by myself?

    If you have sufficient technical knowledge or if you are a handy do-it-yourselfer, you can probably install the Tank-O3 system by consulting the “installation manual” or by watching the "instruction video". An installation manual is always supplied with each system and included in the package. If required, you can ask for an installation manual by email. This will be sent to you digitally!

    12. How do I know whether my tank is suitable?

    Tank-O3 is suitable for plastic and stainless steel clean water tanks* up to approx. 150 liters. For a larger tank capacity we may recommend multiple systems to achieve a good distribution of ozone in the water tank. Mail or give us a call for more information!

    Your clean water tank must also have an airflow system. Every built-in and therefore sealed clean water tank with a filler opening on the outside is standardly equipped with such an airflow system. If a water tank was closed off and water was being added, the tank would explode because the air could not escape during filling. That is why this is necessary and therefore automatically present. If you have a loose water tank that is being filled at the water tap by unscrewing the filler cap, you should make a  bleed valve at the top of the tank when using such a tank.

    * Not suitable for aluminum or steel tanks.

    13. What does the system cost?

    You can see Tank-O3 as a long-term investment, the system will last for years, except for the cell nucleus, which is susceptible to wear.

    The suggested retail price for the Tank-O3 system is set at € 399.

    Avoid unnecessary doctor fees and trouble during your holiday and weekend trips and dare to invest, costs are around € 30 on average per person per year based on depreciation and maintenance costs. (based on 2 people).

    14. What does a cell nucleus replacement cost?

    A replacement cell nucleus costs € 39.95. These are the maximum fixed costs per year! On average, a cell nucleus lasts 2 to 3 seasons with normal use.

    You are therefore making a "long-term" investment, which means that it is probably cheaper in the long run than when buying addition after addition.

    You can easily order a new cell nucleus at

    Provide your complete address and the cell nucleus will be sent to you immediately, accompanied by an invoice of € 39.95!

    15. Does the system require maintenance?

    After installation, the only maintenance is to remove any limescale deposits from the cell nucleus (the small wear part at the bottom of the system.) We therefore recommend that the system is checked once every 2 to 3 weeks. If necessary, clean the cell nucleus by immersing the cell nucleus for a short time in citric acid or cleaning vinegar, see cleaning tips.

    To ensure that the system works properly, we recommend replacing the cell nucleus every season. This is highly dependent on motorhome use, however. This is required more often when the system is used frequently and continuously than during normal motorhome use, when the system will be switched off more often. Or at least make sure you have a replacement cell core with you. This can be ordered by mail.

    16. How to prepare for long-term storage such as in winter?

    When the motorhome  is not used for a longer period of time, we advise you to empty the tank and switch off the Tank-O3 system (remove the plug). The big advantage is that the motorhome is stored with a completely clean drinking water tank. This is in contrast to what often happens: the tank is cleaned just before the motorhome is used again. This is no longer necessary, however, as the tank is always clean. At the start of the season, if necessary, rinse the tank with water, then fill with water, switch on the Tank-O3system again and  set off at ease again with a clean tank and safe water!

    17. Are there any accessories and loose parts available for the Tank-O3 system?

    We can provide you with any replacement parts or accessories you need for installation or to prevent malfunctions. Even if you want to expand the system, we provide a good waterproofing of the brass fitting in the lid. Click here for the accessories and parts price list. Always mail your order for accessories and parts, with the exception of the replacement cell nucleus that various dealers have in stock.

    18. Is there any guarantee on the system?

    There is a 2-year guarantee on the fixed parts of the system. The cell nucleus is a so-called wear part which, with continuous use, lasts a whole season on average. No guarantee is provided for this. Enter your warranty certificate here!

    19. Does the system not drain the battery?

    Given the extremely low power consumption of max. 50 mA (tank approx. 150 liters), the battery will not be drained quickly. If you keep the battery in good condition by using a charger, constant battery charger or a fixed connection, no problem will arise whatsoever. If the motorhome is stationary for a long period of time, it is advisable to switch off the system so that you store the motorhome with a completely clean tank for an easy new start!

    20. How can I switch off the system?

    This can be done by disconnecting the power supply that is plugged into the Tank-O3 flow controller with a plug.

    21. What happens if there is no more water in the clean water tank?

    Nothing happens, because no electrolysis takes place, the cell nucleus will not consume any power. However, it is advisable to ensure that there is sufficient water in the water tank thus the Tank-O3 system can do the job for which it is intended! When the motorhome  is standing for a long time, drain the water as usual and switch off the Tank-O3 system obviously. Think of the winter period

    Extra advantage: normally you park your motorhome with an uncleaned water tank, from now on with a clean water tank.

    22. Is there a type approval for the system?

    The supplier of the system has issued Tank-O3with a declaration of conformity. The text reads as follows: The manufacturer assures, on its own responsibility, that the the electrolytic ozone generator, model Tank-O3 is in accordance with 

    the requirements of the following  regulations:

    93/68 / EEC low voltage directive, DIN EN 61010 Safety requirements for electrical equipment for measurement, control, and laboratory use 89/336 / EEC electromagnetic compatibility EMC DIN EN measurements of ratio-interference performance in electrical appliances and the tighter inspection reports 50081 part 1 technical basis standard emission nl 55014. This statement complies with NL 45014.

    The Ozone Safety Information Sheet can be requested from us by email.