GRP Panel Tank Sizes: Capacity, Dimensions and Panel Count
A GRP panel tank is built from 1 metre panels, so its capacity is easy to work out: length x width x height in metres, multiplied by 1,000 litres.
This guide gives you the size chart, the panel count for each layout, and the steps to size a panel tank for your project. For how panel tanks are built and installed, see our sectional GRP panel tank guide.
How GRP Panel Tank Capacity Works
Sectional panel tanks are assembled from square panels, typically 1 m x 1 m, bolted together on site. Because every panel is one metre, a tank's length, width and height are whole numbers of metres, and capacity follows directly:
- 1 cubic metre = 1,000 litres = about 264 US Gallons (USG)
- Capacity in litres = length x width x height (in metres) x 1,000
- Capacity in USG = litres divided by 3.785
These are nominal capacities, meaning the full internal volume of the box. The working volume is somewhat lower because the water level sits below the overflow and roof, so the exact usable figure is confirmed at design stage.
GRP Panel Tank Size Chart
| Layout (L x W x H, metres) | Volume | Litres | US Gallons | Approx. Panels |
|---|---|---|---|---|
| 2 x 1 x 1 | 2 m3 | 2,000 | 528 | 10 |
| 2 x 2 x 1 | 4 m3 | 4,000 | 1,057 | 16 |
| 2 x 2 x 2 | 8 m3 | 8,000 | 2,113 | 24 |
| 3 x 2 x 2 | 12 m3 | 12,000 | 3,170 | 32 |
| 4 x 2 x 2 | 16 m3 | 16,000 | 4,227 | 40 |
| 4 x 3 x 2 | 24 m3 | 24,000 | 6,340 | 52 |
| 5 x 4 x 2 | 40 m3 | 40,000 | 10,567 | 76 |
| 5 x 5 x 3 | 75 m3 | 75,000 | 19,813 | 110 |
| 10 x 5 x 2 | 100 m3 | 100,000 | 26,417 | 160 |
| 10 x 10 x 3 | 300 m3 | 300,000 | 79,252 | 320 |
The panel count is for a fully panelled closed box: 2 x (L x W + L x H + W x H). Actual counts depend on the base design, internal reinforcement, and corner components, and are confirmed at quotation.
Common Capacities and the Nearest Layout
KHAZAAN panel tank catalogue capacities start at 1,000 USG and run to 100,000 USG and beyond. Catalogue sizes are nominal, so the nearest whole-metre layout differs slightly:
- 1,000 USG class (3.8 m3): 2 x 2 x 1 gives 4 m3, or 1,057 USG
- 2,000 USG class (7.6 m3): 2 x 2 x 2 gives 8 m3, or 2,113 USG
- 5,000 USG class (18.9 m3): 5 x 4 x 1 gives 20 m3, or 5,283 USG
- 10,000 USG class (37.9 m3): 5 x 4 x 2 gives 40 m3, or 10,567 USG
- 20,000 USG class (75.7 m3): 5 x 5 x 3 gives 75 m3, or 19,813 USG
How to Size a GRP Panel Tank for Your Project
- Estimate daily water use. Residential use is typically 150 to 200 litres per person per day.
- Decide how many days of reserve you want, such as 2 to 3 days.
- Multiply: for example, 6 people x 200 litres x 3 days = 3,600 litres.
- Round up to the next whole-metre layout: 3,600 litres fits within a 2 x 2 x 1 layout (4,000 litres).
- Check the site: available footprint, ceiling height, and access for panels.
Fire-fighting reserves are sized to the applicable civil defence requirement, not to daily household use, so confirm the required volume with your consultant.
Site Planning: Footprint, Height and Load
Water weighs 1 tonne per cubic metre, so a 16 m3 tank holds 16 tonnes of water. The base or plinth must be designed for that load. Leave clear working space around the tank for inspection and maintenance. Because panels are small enough to carry through doorways and lift shafts, panel tanks suit plant rooms and basements that a single-piece tank cannot reach. See panel tanks vs single-piece GRP tanks.
GRP Panel Tank Price
Panel tank pricing depends on total capacity, the support frame, and site conditions, so it is quoted per project rather than from a fixed catalogue price. Send your required capacity or dimensions to KHAZAAN for a quotation. See our hot press panel tanks range, and our GRP tank price guide for single-piece GRP tanks.
Frequently Asked Questions
Q: What is a GRP tank? A: A GRP tank is a water storage tank made from Glass Reinforced Plastic, a composite of glass fibre and resin. It resists corrosion and does not rust. See what is a GRP tank.
Q: What is a GRP panel? A: A GRP panel is a flat section of glass-reinforced plastic, produced by hot pressing glass fibre and resin (SMC) in a mould. Panels are bolted together with gaskets and sealant to form a complete tank.
Q: What is the difference between FRP and GRP tanks? A: FRP means fibre-reinforced plastic, a broader term that can include carbon or other fibres. GRP means glass-reinforced plastic. For water tanks the two terms are used interchangeably, since both refer to a glass-fibre composite tank.
Q: What is the cost of a GRP tank? A: Single-piece GRP tanks range from about AED 1,000 for a 300 USG tank to AED 50,000 or more for 20,000 USG. Panel tanks are quoted per project. See our GRP tank price guide.
Q: What are GRP panel tanks used for in the UAE? A: Potable water storage, fire-fighting reserves, and process water in villas, hotels, towers, labour camps, factories, and infrastructure projects, especially where access rules out a single-piece tank.
Q: What are the advantages of GRP panel tanks compared with conventional tanks? A: They resist corrosion, ship as flat panels that fit through doors and lifts, can be built to almost any capacity, and can be extended later by adding panels.
Q: What sizes and capacities are available for GRP panel tanks? A: KHAZAAN catalogue sizes run from 1,000 USG to 100,000 USG and beyond, and layouts are built in whole metres from 1 m panels. See the size chart above.
Q: How many panels do I need for a given capacity? A: For a closed box, panels = 2 x (L x W + L x H + W x H). For example, a 2 x 2 x 2 m tank (8,000 litres) needs about 24 panels. Exact counts are confirmed at quotation.
Q: How do I convert cubic metres to gallons? A: Multiply cubic metres by 1,000 to get litres, then divide by 3.785 for US Gallons. For example, 8 m3 is 8,000 litres, or about 2,113 USG.
Q: How long do GRP panel tanks last? A: GRP tanks typically last 20 to 25 years in UAE conditions. KHAZAAN GRP panel tanks carry a 2-year warranty.
Q: Are GRP panel tanks suitable for drinking water? A: Yes, when the panels use a food-grade gel coat and hold UAE Municipality approval for potable water contact. Confirm the certificate for your specific tank.
Q: Do GRP panel tanks prevent algae growth? A: Opaque panels block sunlight, which limits algae growth. Regular cleaning is still needed. See our water tank cleaning service.
Q: What materials and specifications are used to make GRP panels? A: Sheet Moulding Compound (SMC): glass fibre and resin, hot pressed in a hydraulic mould, with bolt holes along the edges and gaskets at each joint.
Q: Can GRP panel tanks be installed outdoors in the UAE climate? A: Yes. GRP resists corrosion and UV. Exposed rooftop tanks can heat up in summer, so ask about insulation for hot locations.
Q: Can a panel tank be insulated? A: Insulated panel options exist in the market. Ask KHAZAAN whether insulation is available for your project, particularly for exposed rooftops.
Q: How is a GRP panel tank installed and assembled? A: Panels are bolted together on a levelled base with gaskets at every joint, braced with an internal or external frame for larger tanks, then leak-tested by filling with water.
Q: How often does a GRP panel tank need cleaning and maintenance? A: Clean and disinfect at least once a year, and inspect joints, gaskets, and bolts during each visit. See our cleaning and maintenance guide.
Q: Who are the GRP panel tank suppliers in the UAE? A: Several companies supply panel tanks. Compare them on certification, panel quality, warranty, and installation support. KHAZAAN supplies hot press panel tanks across all seven emirates.
Q: How do I choose the right GRP panel tank supplier in the UAE? A: Ask for UAE Municipality Certification, the panel material and thickness, the warranty, and references for similar-size projects. See our GRP tank supplier guide.
To size a GRP panel tank for your project, WhatsApp KHAZAAN on +971509583173 with your required capacity or available dimensions. UAE Municipality Certified, delivered across all seven emirates.