Factory Defective Backflow Assemblies

The ballpoint pen in this picture is pointing at a casting defect on the bottom of a 4″Febco 870 seat.

This defect is prohibiting the seat from coming into full contact with the seat gasket and the assembly to provide a watertight seal.

When inspecting parts during a repair, it is important to take the time to inspect the entire part not just one side for damage, manufacturing defects, etc.

Click photo  to enlarge