Page 241 - Vessel Sanitation Program 2018 Operations Manual
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VSP 2018 Operations Manual
13.6 Potable Water Pipe and System Disinfection Method Examples
(Nonemergency)
Examples in this section relate to nonemergency situations. In an emergency, see
section 5.3.4.1.4 for concentration and contact time.
To achieve the proper DISINFECTION of a section of pipe being replaced,
• Fill the pipe with 50 MG/L (ppm) of free residual HALOGEN, cap on
both ends, and let it sit for 4 hours OR Place small sections of pipes in a
large container filled with 50 MG/L (ppm) of free residual HALOGEN for
4 hours.
• Drain and flush disinfected parts of the system with POTABLE WATER.
To achieve the proper DISINFECTION of a section of pipe already installed on
part of the distribution system,
1. Install temporary shut-off valves at each end of the new section.
2. Close the valves.
3. Inject 50 MG/L (ppm) of free residual HALOGEN through a temporary
injection port.
4. Let it stand for 4 hours.
5. Drain and flush disinfected parts of the system with POTABLE WATER.
Annex 13.6: Potable Water Pipe and System Disinfection Method Examples; 188
