Seeking industry feedback on temporary ends of water mains

Problem statement: Unitywater wants to ensure the age of water in water mains is as low as possible to maintain Unitywater's high water quality standards. 

Temporary ends of water mains are a concern when they exceed 2m.

Section 5.10.2 of the Seq code requires the water agency to define the requirement for temporary dead end mains. 

Questions: 

1. How does Unitywater maintain water quality standards without stipulating that the need dead-end water mains not to exceed 2m?
2. What does other service providers you work with do?
3. What should be defined as temporary?
4. What is the Seq code missing, e.g., the standard drawings are they missing anything?
5. How  should we communicate changes or updates in the future?