This standard presents essential procedures for the disinfection of new and
repaired potable water mains. All new water mains shall be disinfected before
they are placed in service. All water mains taken out of service for inspection,
repair, or other activities that might lead to contamination of...
Back to C651-99: AWWA Standard for Disinfecting Water Mains (PDF)
This standard presents essential procedures for the disinfection of new and
repaired potable water mains. All new water mains shall be disinfected before
they are placed in service. All water mains taken out of service for inspection,
repair, or other activities that might lead to contamination of water shall be
disinfected before they are returned to service. Topics covered include forms of
chlorine disinfection, a description of the disinfection procedure, preventive
and corrective measures during construction, methods of chlorination, final
flushing, bacteriological testing, redisinfection, final connections to existing
mains, disinfection procedures when cutting into or repairing existing mains, and
special procedures for caulked tapping sleeves. Appendices cover chlorine
residual testing, chlorine dosages, and disposal of heavily chlorinated water.
The major revision in this edition of ANSI/AWWA C651-99 includes the following:
the format has been changed to AWWA standard style.