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So I have an ro/di unit I got it from brs I have probably had it for close to 5 months and was wondering what maintenance needs to be done to it in order to keep it working.
membranes are usually good for about 1 year. if older toss membrane and get a new one. You can also use a VORTEX D-1 filter to remove silicates and other fine particles.
Good luck!
D