Evenproducts’ Onion Tanks are robust, collapsible water tanks designed specifically for the storage of drinking water in rugged environments.
Our Onion Tank is a lightweight drinking water storage tank, manufactured from PVC-coated fabric with one or two outlet ports carefully positioned at each side of the tank for ease of use. Our Onion Tank has an open top and cover for protection. A valise with carrying handles can be supplied if required.
Onion tanks are used by humanitarian agencies in emergency response following a disaster, or for situations when drinking water has to be stored before use. The main advantages of using Onion Tanks are that they are lightweight to transport, quick to install and easy to relocate. Onion Tanks are also compact to store, ready to deploy very quickly in an emergency. In addition, they are open-topped which allows easy access for cleaning making them suitable for use as settlement tanks for turbid water.
The Onion Tank should be set up on a level, raised area (higher ground or constructed platform) to allow water flow by gravity through distribution lines to tapstands or connected tanks.
Evenproducts’ Onion Tanks are supplied with an essential protective geotextile groundsheet which is installed underneath the tank for protection. Shielding from strong sunlight is a good idea too, and can be provided using any lightweight material.
The Evenproducts’ standard Onion Tank range includes the following nominal capacities; 5000 litres, 10000 litres, 20000 litres and 30000 litres. However, other sizes are available on request.
Good Quality Design and Manufacture from Evenproducts
Evenproducts’ engineers have designed the water tank to meet the needs of field operatives, giving careful thought to how the tank will be transported and used, as well as considering pressures on field engineers setting up drinking water distribution points in an emergency.
Food grade material (1100 g/m2 weight) is used for construction, as specified by Oxfam and UNICEF. The material is UV resistant and designed for use with chlorine making it ideal for use in hot climates where water disinfection is essential for health protection.A black layer, sandwiched between layers of the construction material, blocks UV light and aids protection against algae growth in the stored water.
Each tank is fitted with one or two (depending on size) PVC threaded inlet/outlet ports as standard. Port fittings are firmly welded into the tank with a double-layer of material. This ensures that the port does not break out of the tank wall with use.
Note: optional PVC ball valve shown in picture not included as standard
Onion Tanks are fitted with an integral foam floatation ring on the top edge. This device enables the Onion Tank to expand as it is filled and contain the water body without the need for an external rigid structure.
High-frequency welding methods and tried-and-tested seam construction ensure that our Onion Tanks are able to hold a significant weight of water without the worry of seepage and valuable water loss.
Onion Tanks can be supplied with aluminium or PVC fittings, and alternative size ports. A range of valves, fittings and hoses are available, including these standard Evenproducts’ options:
- 2” PVC Ball Valves with Guillemin-type coupling
- Connection Kit comprising 6m PVC suction hose with Guillemin-type coupling with locking ring fixed with hose bands at each end, combination spanner and Guillemin-type wrench.
- Installation Tool Kit comprising pickaxe, shovel, wrench, barrier tape, rope, spirit level, Guillemin-type couplings one with locking ring and one without, boss green and hemp.
- Tapstand Kit comprising galvanised steel tapstand (3-tap or 6-tap available) installed with Evenflow Water Saver Valves (taps) and 2” Guillemin-type coupling.
- Valise cover with carrying handles for transportation of the tank when rolled up.
- Stencilled Logo can be added to the tank during manufacture