Name

Code

Diameter (d₁)

Diameter (d₂)

Diameter (d₃)

Diameter (d₄)

Y-Branch

SAY

4" thru 48"

-

4" thru 48"

4" thru 48"

Reducing Y-Branch

SAYR

5" thru 48"

-

4" thru 46"

4" thru 46"