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Typically, Single Branches taper as the new line enters the main line. This is because the new line is bringing in more air. The exiting part of the branch (toward the fan) is therefore bigger to accommodate the increase in air. The new line typically enters at 30 or 45 degree so as to 'merge' into the air flow.
Single Branch Wyes
Unit of Measure
1 

Item #

Item Name

Diameter

Angle

Material Thickness

Materials

BL033 N/A 3 Inch (in) Diameter Single Branch Wye N/A 3 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL043 N/A 4 Inch (in) Diameter Single Branch Wye N/A 4 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL053 N/A 5 Inch (in) Diameter Single Branch Wye N/A 5 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL063 N/A 6 Inch (in) Diameter Single Branch Wye N/A 6 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL073 N/A 7 Inch (in) Diameter Single Branch Wye N/A 7 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL083 N/A 8 Inch (in) Diameter Single Branch Wye N/A 8 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL093 N/A 9 Inch (in) Diameter Single Branch Wye N/A 9 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL103 N/A 10 Inch (in) Diameter Single Branch Wye N/A 10 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL113 N/A 11 Inch (in) Diameter Single Branch Wye N/A 11 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL123 N/A 12 Inch (in) Diameter Single Branch Wye N/A 12 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL133 N/A 13 Inch (in) Diameter Single Branch Wye N/A 13 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL143 N/A 14 Inch (in) Diameter Single Branch Wye N/A 14 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL153 N/A 15 Inch (in) Diameter Single Branch Wye N/A 15 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL163 N/A 16 Inch (in) Diameter Single Branch Wye N/A 16 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL173 N/A 17 Inch (in) Diameter Single Branch Wye N/A 17 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL183 N/A 18 Inch (in) Diameter Single Branch Wye N/A 18 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL193 N/A 19 Inch (in) Diameter Single Branch Wye N/A 19 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL203 N/A 20 Inch (in) Diameter Single Branch Wye N/A 20 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL223 N/A 22 Inch (in) Diameter Single Branch Wye N/A 22 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
BL243 N/A 24 Inch (in) Diameter Single Branch Wye N/A 24 in N/A 30 º45 º90 º N/A 18 gauge N/A Available in Galvanized or SS
Unit of Measure
1