Requirements in ASSE LEC 2002 include shower filtration performance requirements and compliance testing for flow rates, chloramine and chlorine reduction, structural integrity, requirements for materials, documentation and markings.

ASSE International Board of Directors and Professional Qualifications Standards Committee have issued an interpretation of a Section 6001 1-1.3 of ASSE/IAPMO/ANSI Series 6000- 2015, Professional Qualifications Standard for Medical Gas Systems Personnel.

2017 revision of ASSE 1022 added a requirement that no copper alloys be used when in contact with the carbonated water, clarified the requirements for the maximum working pressure, and clarified many other procedural descriptions.