C250, D400 Open Trench Cover D400 GRP Trench Cover & Gully Grid – Heavy-Duty, High-Performance Drainage Solution Relinea’s D400 GRP Trench Covers and Gully Grids are the ultimate solution for heavy-duty drainage requirements in high-traffic areas. Designed with innovation and durability in mind, these covers provide a superior alternative to traditional metal counterparts. Whether it’s … Continue reading D400 Open Trench Covers