Water makers are not rocket science. Basically just a high pressure pump, a pressure regulator, and a membrane. After that, it just gets to how much automation you want. Parker purchased a number of water maker companies, Village Marine, Sea Recovery etc. The downside IMO is that the membranes can be proprietary (Parker) and a replacement can cost 4-5 times what a standard size would cost. There are a number of companies that use off the shelf membranes. My $.02
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