MI-440 Roof Drain Stack Flashing Fitting Home » Products » CounterLine Plumbing Products » Roof Drains » MI-440 Roof Drain Stack Flashing Fitting MIFAB® MI-440 Series mild steel stack fitting with counter flashing recess, threaded stack and extension connections. Specification Sheet Catalog Catalog List Pricing Current Catalog: CLPB-2022 Return to Products