FRP Double Seal Manhole Cover

FRP/GRP Products

The FRP Double Seal Manhole Cover from Himalaya is designed for applications where gas-tight and water-tight sealing is critical. Featuring a dual EPDM gasket sealing system, the cover creates a secure barrier between the cover and frame, preventing the escape of foul odours, sewer gases and harmful emissions while restricting the ingress of rainwater, groundwater and surface contaminants. Manufactured from high-strength FRP/GRP composite materials, the cover offers excellent resistance to corrosion, moisture, chemicals and hydrogen sulphide (H?S), making it ideal for sewerage networks, wastewater treatment plants, industrial facilities and utility infrastructure. Available in multiple load classes and custom sizes to suit municipal, commercial and industrial project requirements.

Applications

Sewage Treatment PlantsChemical Processing PlantsHospital InfrastructureWater Treatment PlantsPumping StationsFood Processing FacilitiesUnderground Storage TanksGas Chambers

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Technical Specifications

Load Class	A15 to F900
Sealing	Double EPDM gasket seal
Standard	BS EN 124:2015
Material	FRP/GRP
Gas Tightness	Yes
Odour Control	Yes
Size	300 mm to 1200 mm (Customization Available)

Frequently Asked Questions

FRP (Fibre Reinforced Polypropylene) and GRP (Glass Reinforced Polypropylene) refer to the same product. GRP specifically emphasises glass fibres as the reinforcement material, while FRP is the broader industry term. All Himalaya FRP/GRP products use glass fibre reinforcement with a polyester resin matrix for maximum strength and corrosion resistance.

Himalaya FRP/GRP manhole covers are available across all BS EN 124:2015 load classes from A15 (1.5 tonnes) to F900 (90 tonnes). D400 (40 tonnes) is the most commonly supplied class and is rated for road carriageways, national highways and heavy vehicular areas.

Yes. FRP/GRP is completely immune to acids, alkalis, chlorides and H2S gas - the primary cause of failure in cast iron and concrete covers. This makes Himalaya FRP covers the specified choice for chemical industrial estates, sewage networks, coastal areas and any environment where aggressive chemicals are present.

Yes. Himalaya manufactures FRP/GRP covers in custom sizes from standard dimensions up to 8ft×8ft and beyond. Options include logo embossing, custom colour finishes, project-specific load classes and special sealing configurations. Lead times for non-standard items apply.

Himalaya FRP/GRP products are tested and certified to BS EN 124:2015 standards across all supplied load classes. The company holds ISO 9001:2015 Quality Management System certification and operates one of India's few dedicated 100-ton in-house load testing facilities for FRP covers.

FRP/GRP covers are approximately 60–70% lighter than equivalent cast iron covers and 40–50% lighter than RCC covers of the same size. This dramatically reduces installation effort, eliminates the need for mechanical lifting equipment in most situations and lowers project costs.

FRP Double Seal Manhole Cover