Merit Brass 4 in. 300 A105 Blind Flange. There is no center opening. Standard 8 bolt pattern.
A blind flange may be used for isolating a pipe, valve, or pressure vessel. Flanges may be used when testing pipe pressure, to create an access point in a piping system, to temporarily seal a piping system while modifying or repairing the line, or to create a long-term seal to terminate a piping system.
