Norwalk, Inc.
Approved Headwall Designs
**Click on Desired Size HW-2.2 Concrete Pipe HW-2.1 Use with Corrugated Metal Pipe (C.M.P.) With extension without extension With extension without extension 12" 12" 12" 12" 15" 15" 15" 15" 18" 18" 18" 18" 21" 21" 24" 24" 24" 24" 30" 30" 27" 27" 33" 33" 30" 30" 36" 36 33" '33" 42 42 36" 36" 48 48 42" 42" 54 54 48" 48" 60" 60" 54" 54" 66 66 60" 60" 72 72 66" 66" 72" 72"
HW-2.2 Concrete Pipe
HW-2.1 Use with Corrugated Metal Pipe (C.M.P.)