Disinfection of Pipelines - Disinfection of Pipelines and Storage Facilities Field Guide - page 24

Figure 3-9 Suggested temporary flushing connection (AWWA Standard 651
Disinfecting Water Mains )
Providing Temporary Service
When new pipelines are installed as replacements, interrup-
tions in water service may occur. It is common practice in the US
to install temporary piping to provide continuous service when
the supply is disrupted for more than several hours. Temporary
supply lines are typically installed aboveground (Figure 3-10),
and residences and businesses are connected by flexible hose to
outside spigots or in meter pits.
The use of temporary water lines can significantly increase
the project time and cost. This is because the temporary network
must be disinfected (Figure 3-11), and the water must pass
bacteriological testing before customers can be connected. Addi-
tionally, the public can view the temporary lines as an unsightly