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338000 Litres Coated Steel Water Tank with Liner and Cover

Tank Specifications

Diameter - mm 11890
Height - mm 3040
Capacity - Litres 338000
Capacity - Gallons 74349
Product Code: DWT-TK39/4/CG

Our range of coated, corrugated galvanised steel tanks has been specifically designed to hold large quantities of water at industrial and agricultural sites. The steel used in the tanks...

Full description


UK Mainland Delivery: Free Delivery
Delivery: 3-4 weeks

Tank Specifications

Diameter - mm 11890
Height - mm 3040
Capacity - Litres 338000
Capacity - Gallons 74349
Our range of coated, corrugated galvanised steel tanks has been specifically designed to hold large quantities of water at industrial and agricultural sites. The steel used in the tanks construction is approved to BS2989:1982 regulations and is galvanised with lead free zinc to 275g/m² to EN10142 regulations.
The full range of steel water tanks are WRAS approved to certificate number 0807044 when used with the Butyl liner. The tanks have a minimum safety margin of 40% which means that the structure is capable of holding a minimum of 40% more than the tanks actual volume.
Our galvanised steel water tank kits include:
• Coated, corrugated galvanised curved steel panels with punched bolt holes
• A tailored liner manufactured in PVC, EPDM, Butyl or PE
• 12mm (½ inch) PVC capping to cover the top edge of the tank
• 25mm (1 inch) PVC capping to trap the overlap of the liner over the top of the 12mm capping
• 25mm (1 inch) spring clips to hold the capping in place
• Straining wire and strainer to prevent the liner from slipping in to the tank
• M10 x 20mm plated bolts, nuts and washers
• Holding down brackets and fixing bolts
• Drilled panel to accept your chosen size of tank outlet
The tanks are utilised for the:
• Storage of irrigation water for sports playing surfaces, parklands and garden centres
• Storage of drinking water for emergency aid all over the world
• Collection of rainwater as part of a recycling scheme
• Holding tanks for fish within the Aquaculture industry
• Storage of water on construction sites and quarries for dust suppression
The advantages of the corrugated steel tanks are:
• Extremely strong and durable
• Able to hold much larger quantities of water than Polyethylene water tanks
• Easy to install with a photographic instruction manual supplied with each tank
• Supplied in kit form ready for assembly
• The tank can be disassembled and moved quickly making it ideal for construction sites
• Approved to WRAS regulations (Certificate Number 0807044) when used with the Butyl liner
Tank specification:
Capacity: 338000 Litres (74430 Gallons)
Diameter: 11890mm
Height: 3040mm
The tanks are supplied with an EPDM liner as standard. The EPDM tank liner material is 1mm thick and is very strong and hard wearing. It offers excellent cut through, abrasion and UV resistance. 
Liner info:
Colour: Matt black
Abrasion resistance: Excellent
Chemical resistance: Good
Cut through resistance: Excellent
Flexibility: Very flexible
Temperature resistance: Very good
UV Resistance: Excellent
Repair with: Glue and a patch
The tank also comes as standard with a woven Polypropylene anti-algae cover. The cover is designed to cover and overlap the top edge of the tank. The advantages of woven polypropylene construction are that it offers excellent UV protection preventing algae growth. It also prevents rainwater from directly entering the tank and also stops debris from being blown into the water. A ball valve flap allows access for supply as well as access for sampling the water.
Tank Options:
As the correct type of liner is essential for your tank system, we also offer a choice of optional upgraded liners. Different types of water require different liners, all of which have their own advantages.
Butyl liner:
The Butyl liner is manufactured from 1mm thick material and is suitable for drinking water applications and offers excellent cut through, abrasion and UV resistance.
PVC liner:
The 0.75mm PVC liner is a low cost alternative to the EPDM and Butyl liners. The PVC offers excellent resistance against chlorine and is the ideal choice when storing water with a chlorine content of more than 5ppm. 
FPP liner:
The FPP liner has excellent mechanical properties, chemical resistance and UV stability. FPP is particularly suited to storing water from recirculatory or reverse osmosis systems. The liner has a shiny finish and is class as semi-rigid. The liner has a thickness of 0.75mm.
The range of corrugated steel tanks is supplied with an anti-algae polypropylene cover as standard. An optional coated steel tank cover is available at extra cost. Please see below for additional info.
Coated steel tank cover:
The coated steel tank cover is supplied with two bolted down access hatches and a ball valve bracket. The benefits of the steel cover are that it can withstand greater weight than other available covers and eliminates the risk of people falling through the cover. The cover also prevents the growth of algae and stops evaporation and it also prevents rainwater and debris from entering the tank. The steel cover is powder coated on the external side only.
The tank can be supplied either without and outlet or with a 2, 3 or 4" steel outlet at no extra cost. If you select one of the optional outlets, an outlet hole will be drilled in the centre of a base panel, in the lowest possible working position. A choice of brass bodied gate valve is available if required to suit your choice of outlet.

Ladder, Platform and Handrail

A specifically designed ladder kit for access and inspection to the top of the tank is available as an optional extra. The ladder kit is connected to the outside wall of the tank and with safety in mind is supplied with a platform and handrail. The ladder kit is made from galvanised steel and aluminium and can be fitted to any of the galvanised steel tanks that have a galvanised steel roof.

Please Note: Ladders are only to be used in conjunction with a galvanised steel roof.

Tank placement
It is highly recommended that the steel water tanks are sited on a concrete base. The concrete should be a minimum of 100mm thickness and the concrete should be type C35 300kg/m³. 
*C35 is a very strong concrete mix that is recommended for use on industrial floors, reinforced foundations, piling and underpinning.
Please see the table below for base requirements.
Tank diameter Minimum base diameter Concrete required Sand required
2.74 metres (9 ft) 3.34 metres 0.88m³ 0.30m³
3.65 metres (12 ft) 4.25 metres 1.42m³ 0.53m³
4.57 metres (15 ft) 5.17 metres 2.10m³ 0.82m³
5.48 metres (18 ft) 6.08 metres 2.91m³ 1.18m³
6.40 metres (21 ft) 7.00 metres 3.85m³ 1.61m³
7.32 metres (24 ft) 7.91 metres 4.92m³ 2.10m³
8.23 metres (27 ft) 8.83 metres 6.12m³ 2.66m³
9.14 metres (30 ft) 9.74 metres 7.46m³ 3.28m³
10.06 metres (33 ft) 10.66 metres 8.92m³ 3.97m³
10.97 metres (36 ft) 11.57 metres 10.52m³ 4.73m³
11.89 metres (39 ft) 12.49 metres 12.25m³ 5.55m³
12.80 metres (42 ft) 13.40 metres 14.11m³ 6.44m³
13.71 metres (45 ft) 14.32 metres 16.10m³ 7.39m³
14.63 metres (48 ft) 15.23 metres 18.22m³ 8.41m³
Important delivery information
Please note the tanks are delivered using a 40ft articulated lorry and the receiving customer is responsible for the safe offloading of the tank from the delivery vehicle. The tanks are delivered on pallets, therefore a fork lift truck or similar is required.
If for any reason, delivery on an articulated lorry is not possible, please make us aware of this so that alternate arrangements can be made. Please note additional charges may apply.