These covers are designed to provide sealed access points to underground drainage, sewage, utility and inspection chambers. Because they are both air-tight and water-tight, they prevent water ingress, sewage leakage, odor escape, and infiltration of ground water or surface water.
BS EN 124
AASHTO H-20
AASHTO H-25
ISO 9001:2015
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THERMODRAIN AIR & WATERTIGHT (PRESSFIT) COVERS WITH FRAME
THERMODRAIN Air and Water Tight Covers are tested as per BS EN 124, IS1726 & AASHTO M306 standards for drainage and Utility services meeting all requirements of the code. THERMODRAIN Covers are better performing than Cast Iron, Ductile Iron and RCC manhole covers.
Salient Features of Air and Watertight Covers :
- THERMODRAIN Air and Water Tight (Pressfit) covers are available without bolting
- Covers are available with locally found EPDM gasket in case of damage
- No foul smell or seepage
Key Highlights of Air and Watertight Covers :
- Material : FRP/GRP/Composite material
- Load Bearing capacity range : 2.5T (2.5 Tons) to F900 (90 Tons)
- Shapes : Circular, square and rectangular shapes available
- Seal : Single seal and Double seal arrangements
| THERMODRAIN FRP / GRP / AIR AND WATER TIGHT COVER - SIZES | ||
|---|---|---|
| FRAME OPENING SIZE | ||
| CIRCULAR | RECTANGULAR | SQUARE |
|
400 mm (16") 450mm (17") 500 mm (20") 600 mm (24") 690 mm (27") 762 mm (30") 900 mm (36") 1000 mm (40") |
600 mm x 450 mm (24"x18") 900 mm x 450 mm (36"x18") 900 mm x 600 mm (36"x 24") 990 mm x 1220 mm (40"x 49") |
300 mm x 300 mm (12"x12") 450 mm x 450 mm (18"x18") 600 mm x 600 mm (24"x 24") 750 mm x 750 mm (29"x 29") 900 mm x 900 mm (36"x 36") (2 covers with single frame) 1000 mm x 1000 mm (40"x 40") 1200 mm x 1200 mm (48"x 48") 1500 mm x 1500 mm (60"x 60") |
Frequently Asked Qeustions?
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1) What are THERMODRAIN Air - and Water - Tight Covers designed for?
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2) What types of applications or industries typically use THERMODRAIN covers?They are used for drainage systems, sewer systems, utility and service access chambers, industrial sewage/wastewater systems, and infrastructure where water-tightness and durability are important — including coastal, sewage-heavy or chemically exposed environments.
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3) Are THERMODRAIN covers suitable for both indoor and outdoor installations?Yes — the material and design are intended for a wide range of environments, including outdoor settings exposed to weather, water, sewage, and varying climates.
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4) Do THERMODRAIN covers provide full air-tight and water-tight sealing in all conditions?Yes — THERMODRAIN Air & Water Tight Covers are manufactured with sealing (gasket, press-fit, or double-seal arrangements) to resist seepage, odors, and leakage, even under load or in damp/sewage environments.
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5) What materials are used in manufacturing THERMODRAIN covers?The covers are made from composite materials such as FRP (Fiber-Reinforced Plastic), GRP (Glass-Reinforced Plastic) or other composite/resin-based materials.
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6) Are the materials corrosion-resistant or chemically resistant?Yes. Because the covers are made from non-metal composite materials (no iron/steel), they resist corrosion, rust, and chemical damage — even in sewage, saline water, or chemically exposed environments.
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7) Are THERMODRAIN covers environmentally friendly or recyclable?Because they are non-metal composite covers, they have no scrap metal value (thus less theft risk) and do not require repeated painting or rust treatment. This reduces maintenance and environmental impact associated with metal covers.
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8) Are the covers resistant to heavy loads, pressure, or traffic?Yes. The air/water-tight THERMODRAIN covers are rated for load-bearing capacities from light loads (e.g. 2.5 tons) up to heavy-duty classifications (F900, i.e. 90 tons) depending on model and size.
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9) How easy is it to install a THERMODRAIN cover compared to traditional options?Much easier — because the covers are lighter weight than cast-iron or concrete covers, they are simpler to handle, lift, transport, and install (less manpower/tools).
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