Custom cast iron drain cover
Our custom cast iron drain covers are precision sand-cast for municipal drainage, industrial floor drainage, and residential applications. Available in round and square configurations, each cover features a slotted or grated surface pattern designed to maximize water flow while supporting pedestrian and light vehicle loads. Fully customizable in diameter, slot width, frame depth, and surface finish, with OEM and ODM support and sample production available before mass order commitment.
*Provide your application requirements—such as stress conditions, materials, size range, and even product name. We are always available for customization, so please contact us directly.
Introduction
Why Choose Our Cast Iron Drain Covers?
High Flow Rate Slot Design — The parallel slot pattern is engineered to maximize drainage capacity while preventing debris ingress, keeping drainage systems clear under heavy rainfall and high-volume runoff conditions.
Custom Diameter & Slot Pattern — Outer diameter, slot width, slot spacing, and handle cutout design are all fully customizable to your drawing, ensuring precise fit for existing drainage frames and channels.
Multiple Load Ratings Available — Manufactured to EN124 load classes from A15 (pedestrian areas) to D400 (road and carriageway use), with load class cast directly into the surface for clear identification.
Integrated Lift Handles — Built-in handle cutouts on both sides allow safe and tool-free lifting for maintenance access, a standard requirement for municipal and utility drainage installations.
Durable Black Cast Iron Finish — High-grade grey iron construction with black lacquer or bitumen coating provides strong corrosion resistance for below-ground, wet, and outdoor environments.
Specifications
Category Specifications & Technical Details Product Name Custom Cast Iron Drain Cover Scope of Services • Custom Size & Shape Casting (Square, Round, Linear)
• OEM/ODM Manufacturing for specialized drainage systems
• Heavy-Duty Load Rating Engineering (A15 to F900)
• Prototype Design based on architectural drawings
• Integrated Anti-theft Locking MechanismsMaterials • Ductile Iron (EN-GJS-500-7 / ASTM 65-45-12) for high impact resistance
• Grey Cast Iron (EN-GJL-250 / ASTM Class 35) for standard use
• Corrosion-Resistant Alloyed Iron for chemical/industrial drainage
• High-Tensile Nodular Iron for heavy aircraft/port loadingMachining & Manufacturing • High-Precision Sand Casting & Automatic Molding
• CNC Milling for flush frame-to-cover seating (Zero-Rattle)
• Precision Slot Machining for optimized water intake
• Deburring & Surface Grinding for safety and aesthetics
• Drilling & Tapping for security bolt fixingTarget Industries • Municipal Urban Road & Pedestrian Projects
• Commercial Parking Lots & Shopping Centers
• Industrial Chemical Plants & Food Processing Factories
• Landscape Architecture & Public Parks
• Heavy Infrastructure (Airports, Container Terminals)Surface Treatment • High-Durability Bituminous Coating (Black)
• Epoxy Powder Coating (Available in various RAL colors)
• Hot-Dip Galvanizing for long-term rust prevention
• Anti-Slip Surface Patterning (Diamond/Criss-cross)
• Natural Oxidation-Resistant TreatmentInspection Facilities • Load-Bearing Compression Test Rig (up to 100t+)
• Chemical Spectrometer for Material Certification
• CMM for Dimensional Tolerance Control
• Drainage Flow-Rate Analysis & Testing
• Tensile Strength and Elongation MeasurementOur Advantages 1. Precision Seating: Zero-noise design even under high-speed traffic.
2. Maximum Flow: Engineered slot geometry for high drainage efficiency.
3. Extreme Longevity: High corrosion resistance for 30+ years of maintenance-free use.
4. Anti-Theft Security: Optional hidden hinge or bolt-down locking systems.
5. Fast Customization: Rapid mold creation for unique architectural dimensions.
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I don't have complete drawings, can I send inquiry?
Yes, we can help you analyze based on your description, samples and photos.
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We are a factory and have a project management team that can handle the technology, cost and delivery at the same time.
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