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SOS Official Version Part 890 Plumbing Code A5 - IDPH
Backflow Preventer: A device or an assembly used to prevent contamination of the potable water supply through an actual or potential cross-connection.
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Cross-Connection Control Manual, February 2003
American Water Works Association Policy on Cross-Connections Testing Procedures for Backflow Preventers . I. Sample cross-connection test form .
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form-79-770.pdf - Philadelphia Water Department - Phila.gov
WITNESS TO ASSEMBLY TEST. R. E. P. A. IR. S. NAME OF CERTIFIED BACKFLOW PREVENTION ASSEMBLY. TECHNICIAN (PRINT) PHILADELPHIA, PA 19136.
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