Originally Posted by gbanker
Probably "jumping" this thread, and moderator you can move my post if necessary. Regards membranes- I have heard that the membranes sold by watermaker companies are the same, but much more costly, than those supplied to othes such as photo
shop/film companies. Would you like to comment?
No problem. SR and VM membranes are proprietary and their systems are based on the differences in flows and pressures they want. Many systems membranes are not proprietary and can be interchangeable. Converting to a non proprietary membrane usually requires adjusting the systems pressures and flows because they are set up for the requirements that are built into proprietary ones. Every system will be different based on the size of the unit. I know it's easy to assume it's always about charging
more to the end user for profit but they are trying in the very small boating
area of the RO world to come up with better quality membranes that provide not only better quality/quantity of water but will last longer and be a bit more robust and forgiving of what the average user puts them through. I believe a lot of their R&D into membranes is focused on bigger things and the boating
market is just a small portion of their concerns. I don't deal with photo shop/film companies, I can barely get my cell phone
to take a picture, so I don't have any first hand knowledge or dealings with photo shops. I think that it was the needs in photo shops and printing shops that the SW membranes were developed for originally. I wish I was the first guy that said "Hey, I can use these on boats".