for plumbing facilities in terms of both performance and prescriptive objectives, and provides for the acceptance of new and innovative products, materials, and systems. Important changes include: Updated table for the Minimum Number of Required Plumbing Fixtures. Single-user toilet facilities (a room having a single water closet and a single lavatory) are not required to be labeled for use by only a male or female (separated use designations). Solar thermal water heating systems need to conform to the ICC 900/SRCC 300 standard. Well systems are required to comply with standard NGWA-01 where local requirements do not cover subject matter or are lacking in detail on others.