Warminster’s sloping algae control covers are engineered to block sunlight and reduce algae growth in open channels, launders, and basins.
Lightweight, corrosion-resistant, and easy to install, these fiberglass-reinforced plastic (FRP) covers provide long-term performance in harsh treatment plant environments.
Sloping FRP covers are widely used in:


Each sloping cover is molded from corrosion-resistant FRP laminates that offer:
Sloping algae covers can be supplied with multiple access options to support operator convenience, including:
This flexibility allows plant personnel to inspect equipment without removing large panel sections.


Warminster fabricates all sloping covers to match the geometry of your plant. Custom options include:
Whether retrofitting an existing launder or equipping a new basin, each cover is built to your exact specifications.

Our sloping algae covers are built using materials that meet ANSI/AWWA F101 standards for FRP construction. Depending on the project, we can also supply products compliant with:
These certifications ensure compatibility with public funding and treatment plant requirements.
Warminster’s sloping FRP covers deliver durable, low-maintenance performance in water and wastewater treatment facilities.
Their corrosion resistance, UV stability, and engineered fit make them a dependable option for reducing algae formation and improving plant efficiency.