THERMODRAIN FRP/GRP Drain Channels with Grating or Gully Covers are designed to collect, channel, and cover surface water and storm runoff in drainage systems. They are typically used in stormwater trench drains, car parks, industrial floors, walkways, podiums, roadside gutters, and other drainage applications where water must be safely guided away while maintaining a walkable surface. Their grated top allows water to enter the channel while preventing larger debris from clogging the drainage system.
BS EN 124
AASHTO H-20
AASHTO H-25
ISO 9001:2015
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THERMODRAIN FRP / GRP DRAIN CHANNELS WITH GRATING / GULLY COVERS
THERMODRAIN FRP / GRP / COMPOSITE DRAIN CHANNEL WITH GRATING / GULLY COVER
Method Of Installation Of Thermodrain (1 Piece Type) For Surface Drainage For Exterior And Basements (recommended For Short Length Upto 30 Mtrs)
ADVANTAGES OF FRP / GRP DRAIN CHANNELS
STEP 1 - Prepare a trench of 200 mm extra width than the drain channel width.
STEP 2 - Before laying the Drain channel, check the compactness of the soil and ensure that its compact enough and will not sink due to the load that will be eventually applied on the Grating (refer your civil or soil consultant). In case the soil is found to not take the load than you may create a concrete bed to resist the load with the slope of 1 mm/mtr. for water to flow by gravity.
STEP 3 - Once the concrete / mud bed is ready, you may place the Drain channel in position. The channel installation is to begin from the starting point and proceed towards the exit point.
STEP 4 - You may apply the Silicone sealant on the step given in the channel for joining with the connecting channel or Bend or Tee or Four way Tee. On applying the sealant you may place the connecting piece on the step and continue to place the further connecting pieces in the same manner.
STEP 5 - The connectors like the 90 deg. Bend, Tee and Fourway Tee are to be used as and where required depending on the layout of your site.
STEP 6 - You may refill the empty space around the channel network with the concrete and soil ( As shown in the drawing) and do the required compaction and bring it to the level of the installed grating. Once the filling is completed and cured you may clean the drain channel and you may place the gratings/ Gully covers on the channel network.
Method Of Installation Of Thermodrain (2 Piece Type) For Surface Drainage For Exterior And Basements (recommended For Short & Long Lengths)
DISADVANTAGES OF CEMENT / CONCRETE DRAIN CHANNELS
STEP 1 - Prepare a trench of 200 mm extra width than the drain channel width.
STEP 2 - Before laying the Drain channel, check the compactness of the soil and ensure that its compact enough and will not sink due to the load that will be eventually applied on the Grating ( refer your civil or soil consultant). In case the soil is found to not take the load than you may create a concrete bed to resist the load with the slope of 1 mm/mtr. for water to flow by gravity.
STEP 3 - Once the concrete/mud bed is ready, you may place the Drain channel in position. The channel installation is to begin from the starting point and proceed towards the exit point.
STEP 4 - You may apply the Silicone sealant on the step given in the channel for joining with the connecting channel or Bend or Tee or Four way Tee. On applying the sealant you may place the connecting piece on the step and continue to place the further connecting pieces in the same manner.
STEP 5 - The connectors like the 90 deg. Bend, Tee and Fourway Tee are to be used as and where required depending on the layout of your site.
STEP 6 - You may refill the empty space around the channel network with the concrete and soil ( As shown in the drawing) and do the required compaction and bring it to the level of the installed grating. Once the filling is completed and cured you may clean the drain channel and you may place the gratings/ Gully covers on the channel network.
| THERMODRAIN FRP/GRP/COMPOSITE DRAIN CHANNEL WITH GRATING / GULLY COVER | |
|---|---|
| Sr.No | OUT TO OUT DRAIN CHANNEL SIZE |
| 1 | 128 mm(w) x 155 mm(ht.) x 1000 mm(It.) |
| 2 | 167 mm(w) x 155 mm(ht.) x 1000 mm(It.) |
| 3 | 326 mm(w) x 300 mm(ht.) x 1000 mm(It.) |
| 4 | 525 mm(w) x 300 mm(ht.) x 1000 mm(It.) |
| ADVANTAGES OF FRP/GRP DRAIN CHANNELS | DISADVANTAGES OF CEMENT / CONCRETE DRAIN CHANNELS |
|---|---|
| Blocks site space for minimum time | Site remains blocked due to larger preparation time of cement drains |
| Quick to install as the channel is only to be laid as per manual | Long installation time as large amount of civil work is required. |
| Minimum manpower is required. | Huge manpower is required for civil work. |
| Very low labour cost is incurred for installation. | Very high labour cost is incurred for drain preparation. |
| Installation is fast and simple and not dependent on huge manpower availability. | Preparation of drain channel is slow as it is highly dependent on manpower availability. |
| No water proofing is required. | Water proofing is to be done. |
| Separate MS/FRP angles are not required for placement of Gratings/Gully covers | Separate MS/FRP angles are required for placements of Gratings/Gully covers. |
| No hidden cost during installation of channels. | There is hidden cost during making of drain channels as it is labour oriented. |
Frequently Asked Qeustions?
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1) What are THERMODRAIN FRP/GRP Drain Channels with Grating / Gully Covers used for?
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2) What material are THERMODRAIN Drain Channels and Gratings made from?These drain channels and gratings are made from FRP/GRP composite materials — Fiber Reinforced Plastic (FRP) or Glass Reinforced Plastic (GRP). This composite consists of glass fibers embedded in a resin matrix, producing a lightweight, high-strength, corrosion-resistant, and UV-stable material that performs well in both underground and exposed drainage applications.
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3) How durable are THERMODRAIN FRP/GRP Drain Channels and Gully Covers?
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THERMODRAIN FRP/GRP channels and covers are highly durable and engineered for long service life:
- Corrosion resistant : FRP/GRP does not rust or corrode in wet, saline, or chemically aggressive environments, unlike metal.
- High impact strength : The composite material is flexible rather than brittle, reducing the risk of cracking under load.
- UV and weather stable : UV stabilizers are often added to resist sunlight degradation.
- Lightweight and robust : High strength-to-weight ratio makes them strong enough for heavy traffic zones while still easy to handle.
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4) How do FRP/GRP Drain Channels compare with cast iron covers and gratings?
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FRP/GRP Drain Channels & Gratings vs Cast Iron:
- Weight & handling : FRP/GRP is much lighter, simplifying installation and reducing labor costs.
- Corrosion resistance : FRP/GRP resists corrosion from water, chemicals, and salts; cast iron rusts without protective coatings.
- Theft resistance : FRP/GRP has no scrap value, reducing theft risk compared to cast iron.
- Safety : FRP/GRP can be designed with anti-slip surfaces and is non-conductive, enhancing safety in wet environments.
- Aesthetics & customization : Composite covers can be colored and patterned for urban or architectural projects.
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