If you will not use the water maker on your boat for a long time, wintering service should be done.
As the answer to your question "What is this wintering?"
When prolonging the life of the membranes used when turning sea water into fresh water and continuing their performance, the chemical products used by each brand are mixed with fresh water and recirculated through the membranes. Thanks to this chemical, your membranes are not damaged and you leave your water maker ready for the next season.
If it is necessary to do it when it is started to be used, it is ensured that the chemical in the membranes is removed by operating at a certain time at low pressure.At the end of this process, you will activate the water maker.