Which of the following information is not necessary to send to the Department of Buildings (DOB)?

The information that is not necessary to send to the Department of Buildings (DOB) relates to the testing frequency of pressure reducing valves. While it is crucial to maintain and test pressure reducing valves regularly to ensure proper functioning and safety, this specific detail is not typically required to be reported to the DOB.

In contrast, understanding the location of pressure tanks, the operating temperature of those tanks, and the type and size of valves used is important for the DOB to assess safety standards and compliance with local regulations. These details help ensure that all equipment is installed correctly, functioning safely, and adheres to state and local codes. Each of these elements plays a critical role in the overall safety and operational integrity of high pressure boiler systems.