https://www.hynds.co.nz/product/box-culvert-underpass-system/
Box Culvert Underpass System - Hynds Pipe Systems Ltd.
Jan 16, 2025 - Hynds Box Culvert Underpass System is designed for where a quick-to-install one-piece unit can be used. Standard sizing for box units is 1m wide x 1m high up...
culvert underpass systembox
https://www.hynds.co.nz/product/u-culvert-base-underpass-system/
U Culvert & Base Underpass System - Hynds Pipe Systems Ltd.
underpass system hyndsculvert
https://www.hynds.co.nz/product/twin-u-culvert-underpass-system/
Twin U Culvert Underpass System (SI Only) - Hynds Pipe Systems Ltd.
Jan 16, 2025 - *Only Available in the South Island Hynds Twin U Culvert Underpass System is designed for when two-piece units can be used to enable a height of up to 4...
culvert underpass systemtwin