Victaulic Number 20 Orange Enameled Tees are specifically designed for use in fluted pipe systems. Fittings are supplied grooved or shouldered to conform to standard steel pipe outside diameter. When connecting wafer or lug-type butterfly valves directly to Victaulic fittings with 741 or 743 Vic-Flange ID adapters, verify metric disc with mounting dimensions. Fittings are supplied in a variety of materials, including ductile iron, steel, or welded steel segments, depending on style and size. Fittings are painted with an orange enamel galvanized finish; available as an option; contact Victaulic for details. Standard: Ductile iron conforming to ASTM A-536, Grade 65-45-12.