If the boat is stopped, it is recommended to make a fresh water rinse of the watermaker at least every week. For prolonged periods it would be necessary to winterize the system and use a membrane storage (SC-1) to prepare the watermaker for the following season. In this way we prevent the growth of marine microbiology and protect the membranes in a long term storage. A properly pickled system will stay fresh for 6 months in temperate climates or 4 months in the tropics, after which it needs to be flushed and the preservation process repeated. To preserve and also freeze protect in winter climates, it is important to use a propylene glycol solution.
If in the end we have not done a correct winterizing and the membranes are dirty and we want to try to recover them, we can use other products to clean the system. First, an acid cleaner (MCC-2, removes mineral scale deposits) will be used and then an alkaline cleaner (MCC-1, remove biological matter and grime from the surface of the membranes). However, it is worth remembering chemical cleaning is usually not effective if fouling has dropped production below 80% of the original condition.
The basic procedure for all cleaning and preservative treatments is the same: a specific chemical solution is circulated through the system for 20 minutes and then flushed out. It is important to always follow the manufacturer’s instructions and not exceed the recommended doses.
More information on the chemicals to be used at: https://tienda.dessal.es/13-quimicos