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.