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How do I clean the water system on my HYMER vehicle?

Regular cleaning of the water system in your HYMER vehicle is important to ensure the cleanliness of the fresh water and to avoid the formation of bacteria.

Why should the water system in your vehicle be cleaned regularly?

Fresh water tanks, hoses and taps that are not cleaned regularly provide a good breeding ground for bacteria. This biofilm, which can settle in tanks, on the tank walls or on the hoses, must be counteracted and prevented from forming by regularly cleaning the water system.

How often should you clean the water system?

You should carry out a thorough cleaning of the entire water system at least once a year. Ideally, you clean the water system once at the beginning of the season and at the end of the season.

It is best to clean your vehicle's waste water tank after each use/trip, as this is where the waste water (grey water) collects and where food residue and other deposits can quickly form a biofilm.

How do you clean the water system?

1. Clean the water tank

  • Empty the water tank and close the drain opening 
  • Remove the water tank cap and fill the water tank with water with a little detergent
  • You can now clean the water tank with a standard dishwashing brush until there is no longer any visible deposits
    Also clean the pump housing
  • If possible, clean the fresh water probes by hand through the cleaning opening
  • Then rinse the water tank with plenty of drinking water

If cleaning as described above is not possible due to the design of the water tank, you can also clean the water tank with chemical cleaning agents. Please note the cleaning agent manufacturer's application instructions.

To clean the water tank, only use suitable cleaning agents from specialist retailers. Your HYMER trading partner will be happy to advise you on this. You can find an overview of all trading and service partners here.

2. Clean water pipes

Please only use suitable cleaning agents from specialist retailers to clean your water pipes. Your HYMER trading partner will be happy to advise you on this. You can find an overview of all trading and service partners here.

  • Please empty the water system
  • Close all drain openings and drain cocks
  • Then fill the water and cleaning agent mixture into the water tank.
    Please note the manufacturer's instructions for the correct mixing ratio
  • Open drain taps individually and leave them open long enough for the water and cleaning agent mixture to reach the respective outlet
  • Close the drain tap again and set all taps to “warm” and open them
  • Leave the taps open until the water and detergent mixture reaches the spout
  • Set all taps to “cold” and open them
  • Leave the taps open until the water and detergent mixture reaches the spout
  • Then close the taps
  • Flush the toilet several times
  • Allow the cleaning agent to take effect according to the instructions
  • Now empty the water system
    Please dispose of the water and cleaning agent mixture properly
  • Now rinse the entire water system several times with drinking water. To do this, fill and empty the water system several times

3. Disinfect the water system

Please disinfect the water system immediately, as described in point 2 “Cleaning water pipes”. Here, use the disinfectant as specified in the cleaning agent manufacturer's instructions for use.

To disinfect your water system, please only use suitable cleaning agents from specialist retailers. Your HYMER trading partner will be happy to advise you on this. You can find an overview of all trading and service partners here.

4. Clean the waste water tank

  • Empty the waste water tank and dispose of the waste water properly
  • Open the cleaning opening on the waste water tank and the drain cock
  • Rinse the waste water tank thoroughly with water
  • If possible, clean the waste water probes by hand through the cleaning opening

You can also get special cleaning products from specialist retailers to clean your waste water tank. Your HYMER trading partner will be happy to advise you on this. You can find an overview of all trading and service partners here.

Further information on cleaning your HYMER motorhome can be found here: Tips & Tricks: Clean your motorhome properly

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