I have a question in reference to the water makers. It is my understanding that they do not work in brackish water, large bays ect. Is that correct?
No problem in brackish water. What you want to do is back off on the membrane pressure so your rated output is about what it should be in salt water. As an example: If you have a 24 gallon per hour water maker, your membrane pressure is usually set/rated at 800 psi, if you are in brackish water, adjust the membrane pressure down to get about the same rated out put of 24 gallons per hour.
There a 2 things that will kill a membrane, oil and chlorine. If you stay away from those, you can pretty much make water anywhere.