Preserve the useful detail
Inventory connected equipment, installed protection, test tags, bypasses, pressure relationships, access, and changes since inspection.
The decision on display
Do not transfer the hazard
Do not remove, bypass, or substitute a backflow device. Ask the water system and plumbing inspector what approval and testing apply.
Make the proposed work comparable
Name the connection, approved protection, installer, permit, isolation, testing, certification, records, and maintenance access.
CURRENT PRIMARY SOURCE