What is defined as "product water"?

The term "product water" specifically refers to water that has undergone a treatment process, particularly in the context of water purification systems, and meets certain quality standards for its intended use. In the case of reverse osmosis (RO) systems, product water is the purified water that exits the RO membrane and is ready for use, having been treated to remove impurities and contaminants.

When we say that this "product water" meets AAMI standards, we are emphasizing that it satisfies specific guidelines set forth by the Association for the Advancement of Medical Instrumentation. These standards ensure that the water is safe and effective for use in medical devices, particularly in healthcare facilities.

Other options like water from the holding tank or water collected after ultrafiltration may not meet the same purity standards or are not specifically the end product intended for critical applications. Similarly, water treated with UV light is an additional treatment process, but it isn't exclusively defined as product water unless it meets the necessary standards post-treatment. Therefore, the definition as it pertains to product water most accurately aligns with the description of water exiting the RO system and meeting AAMI standards.