Large GRP water tanks from 20,000 litres up for buildings and projects
We make large tanks to order in our Dammam factory, horizontal on saddles, for burial or vertical, and deliver them on low-bed trailers to sites in every region.
- 100,000 L and larger by design
- Drawing with the quote
- 25-year warranty
- Delivery to every region
We reply within one working hour, Saturday to Thursday.
Large capacities on diameters that suit the site
Large tanks are built on diameters from 2.00 to 3.50 m, with the length set by capacity. Above 100,000 litres we design the tank to the project.
The rows below are examples from our horizontal size chart; sizes in between are made to order. Vertical tanks are also built, for example 75,000 litres at 3.50 m diameter and 8 m tall.
| Capacity | Diameter | Approx. length |
|---|---|---|
| 20,000 L | 2.00 m | 6.50 m |
| 20,000 L | 2.40 m | 4.50 m |
| 30,000 L | 2.40 m | 6.50 m |
| 30,000 L | 3.00 m | 4.50 m |
| 40,000 L | 3.00 m | 6.00 m |
| 50,000 L | 3.00 m | 7.40 m |
| 60,000 L | 3.50 m | 6.30 m |
| 75,000 L | 3.50 m | 8.00 m |
| 90,000 L | 3.50 m | 9.50 m |
| 100,000 L | 3.50 m | 10.50 m |
From our factory and delivery sites
Real photos from the Laura factory in Dammam and from loading and delivery.
One large tank or several?
We supply batches of tanks for a single project, buried side by side or set above ground to the layout drawing.
- Several tanks: one can be cleaned or serviced while the rest stay in use; they are easier to transport and fit narrow sites or separate pits.
- One large tank: fewer connections and one place to install and clean, but it needs a larger base or pit and a heavier crane.
- One tank with two compartments: we partition the shell on request so one side can be serviced while the other stays in service.
Transport and placement on site
Large tanks travel on low-bed trailers: one or two saddle tanks per trip, or about seven to eight mid-size underground tanks. Diameters up to 2.40 m move as normal loads; 3.00 m and 3.50 m are oversize, and we plan the route with you.
- Crane placement on site is a paid service on request, priced in the quote.
- The site provides access for the low-bed and crane, and a level base or finished pit before the tank arrives.
- We do not excavate, pour concrete or backfill; that is your contractor's work under the installation guide.
Project documents on request
Consultants ask for documents before they accept a tank, so we send them with the quote when requested:
- General arrangement drawing with dimensions and nozzle positions, prepared by our draughtsman with the quote
- Tank data sheet
- Installation and burial guide
- Copies of the factory's ISO 9001, 14001 and 45001 certificates
- VAT tax invoice in the company's name
Frequently asked questions
What is the largest tank you build?
Our size chart runs to about 100,000 litres horizontal at 3.50 m diameter, and 100,000 litres vertical. Beyond that we design the tank to the project.
How long does a large tank take?
Common sizes are in stock; other sizes take about a week depending on the order, and large quantities are scheduled with production, with the date stated in the quote.
Do you provide a drawing for the consultant?
Yes. Our draughtsman prepares a drawing with dimensions and nozzle positions, attached to the quote.
Can a large tank be buried?
Yes, under the same burial guide: blinding concrete, clean sand, a reinforced concrete slab and no more than 20 cm of backfill on top. Where the site cannot be excavated, we build it above ground on saddles.
How much capacity does a building or compound need?
A common method: residents × 150 to 250 litres a day × the reserve days your engineer requires. We then split that capacity across one or more tanks to suit space and maintenance.
Does the same warranty apply?
Yes. The factory guarantees the tank for 25 years from the invoice date against manufacturing defects, provided the installation guide is followed.
Related pages
Buildings and compounds
Large capacities for every unit, crane placement, and a VAT invoice to your entity.
Contractors and developers
Tanks in project quantities to the specification, with a submittal for the consultant.
Technical submittals
Data sheet, drawings and warranty with the quotation, on request.
Crane placement
Our crew sets the tank in the pit or on the base.
Ready for your quote?
Send the type, capacity and city, and we reply within an hour.