What unapproved Repair Parts look like for the Febco 765-1, PVB
If you are the backflow inspector and Pass this Backflow Prevention Assembly, you have just accepted liability in any contamination event at this location.
The Febco Parts approved by the USC testing lab are the parts in the assembly with the amber color. The Yellow Parts or sometimes blue parts are not part of the USC testing program and have not been proven to protect against a backflow event. Yes, it may stop the backflow assembly from leaking, but the purpose of the backflow prevention assembly is to protect the water supply. All backflow Prevention Assemblies must be tested by a licensed Backflow Technician after repairs to ensure that they are working properly.