The Allied Gomco 01-90-5042 is a critical manifold fitting designed for the 100 series pump assemblies used in various Gomco suction units. This connector serves as the structural link between the pump's vacuum inlet and the disposable bacteria filter. Featuring a precision-machined 1/8" NPT male thread on one end, it screws directly into the pump head assembly to provide an airtight, secure attachment point. This OEM component is essential for maintaining proper vacuum integrity and ensuring that the protective bacteria filter remains correctly positioned to shield the internal pump diaphragm from clinical contaminants and fluids.