What does the term "product water" refer to in reverse osmosis systems?

The term "product water" in reverse osmosis systems specifically refers to the water that has successfully passed through the RO membrane. This process involves the separation of contaminants from the feed water, allowing only clean water to move through the membrane while rejecting impurities and undesirable substances.

The significance of identifying this water as "product water" lies in its purity and intended use. It is the treated or finished product of the reverse osmosis system, ready for applications such as drinking, industrial uses, or other purposes where high purity is required. In contrast, water that has not been treated, wastewater from the system, or water containing contaminants do not meet the criteria for product water since they either indicate untreated conditions or are the byproducts of the filtration process.