SUPREME AQUA GOLD MOULDED PIPE FITTINGS - SCH80 Circuit Flange Adapter (Size-65mm) - Flange adaptors connect a flanged portion to the spigot end of a pipe or tube. They are used to connect networks made of several materials or networks created specifically for one material. They are available in varieties that anchor or do not anchor, with the self-anchoring (locking) goods not requiring concrete anchor blocks.