A thorough knowledge of RO components can help you configure the most effective system possible.
Some designs are better than others, but no one design is best for all situations.
Most dealers and manufacturers will use and recommend different models or designs for different feedwater or end-use requirements, but there are situations where this is not enough and system customization will be required. Installing an RO system is not as easy as connecting plumbing. Sometimes this works, but not in all cases. A good overall RO design is typically conservative with respect to operating conditions. However, compensating for every possible feedwater problem would be prohibitively expensive.