Why is it important to choose the right drinking water storage tank / potable water tank?

If drinking water is stored in inappropriate conditions, there is a serious risk of microbiological contamination, algae growth, unpleasant odor, or even toxic substances resulting from contact with incompatible materials. The right tank is the one that protects the water from contamination, UV rays, temperature fluctuations, and physical damage, while also facilitating maintenance and extending its usable lifespan.

 

Black drinking water storage tanks


Main criteria when choosing a drinking water storage tank / potable water tank

1. Purpose of use

Determine in advance what you will use the water for – this will define the requirements for material, volume, and installation:

  • Drinking water – the tank must be made of materials with a food-grade certificate, such as:

    • Food-grade polyethylene (LLDPE, PE HD food grade)

    • Stainless steel AISI 304 or AISI 316

    • Materials with internal antibacterial coating

  • Water for irrigation or household use (washing machines, toilets) – allows the use of a wider range of materials, including fiberglass or even metal with appropriate corrosion protection.

  • Rainwater – it is recommended to use dark plastic tanks with built-in filters and overflow systems to reduce sediment buildup and insect intrusion.

 

Potable water tank

 

2. Capacity: How much water do you need?

The correct volume depends on the number of users, usage frequency, and purpose:

  • 500 liters – for emergency needs, small families, villas, guest houses.

  • 1000–5000 liters – sufficient for garden irrigation, drip irrigation, livestock farms.

  • 10,000+ liters – industrial facilities, municipal systems, hotels, hospitals, and farming cooperatives.

Tip: Provide 20–30% additional capacity above regular consumption to cover seasonal fluctuations or emergencies.

3. Installation type: Underground or above-ground?

  • Above-ground drinking water storage tanks / potable water tanks:

    • Easy to install and dismantle

    • Visible and easy access for inspection and cleaning

    • Lower installation cost

    • Vulnerable to freezing and UV rays (requires coloring and insulation)

  • Underground drinking water storage tanks / potable water tanks:

    • Suitable for locations with limited space

    • Protected from temperature fluctuations and sunlight

    • Longer lifespan but higher installation cost, requiring drainage and ventilation

 

Underground water tanks 

 

4. Material

Each material has specific advantages:

  • Polyethylene (PE, LLDPE):

    • Lightweight and easy to transport

    • Chemical and corrosion resistant

    • UV-stabilized

    • The most popular choice for households

  • Stainless steel:

    • High durability

    • Easy to clean and disinfect

    • Suitable for professional kitchens, hospitals, laboratories

  • Fiberglass:

    • Strong and corrosion-resistant

    • Suitable for more aggressive environments

    • Lightweight but more expensive than plastic alternatives

  • Concrete:

    • Massive and long-lasting

    • Suitable for large installations

    • Requires professional installation, not suitable for households

5. Size and shape according to installation space

Not every tank fits every space. Careful measurement is essential:

  • Vertical tanks – for narrow spaces with height

  • Horizontal – for wider spaces or low ceilings

  • Corner and prismatic – optimal use of space in garages, basements, shafts

  • Modular (assembled) – easy transport through narrow doors or difficult terrain

 

Black 1500 L potable water tank   White 1000 L potable water tank   Black 750 L potable water tank   White 500 L potable water tank

 

6. Color and UV protection

Especially for plastic tanks, color has functional significance:

  • Blue, green, or black tanks:

    • Block sunlight penetration

    • Prevent algae growth

    • Suitable for outdoor installation

  • White or light-colored tanks:

    • For indoor use only, as they let UV rays through

For metal or polyester tanks, UV protection is built in, so color is more of an aesthetic choice.

Maintenance and cleaning

Regular hygiene extends the life of the tank and protects the water:

  • Cleaning every 3–4 months, depending on the type of water

  • Removal of sediment and deposits using water jet or brush

  • Disinfection with specialized products safe for drinking water

  • Ventilation and complete drying before refilling

 

Potable water tank

 

Additional tips when buying

  • Ensure the material has a food-grade certificate (LLDPE, NSF, ISO, FDA or equivalent)

  • Check the warranty terms – good manufacturers offer 2 to 10 years warranty

  • Prefer tanks with access through a lid or hatch for cleaning

  • Look for spare parts and accessories: valves, float valves, filters

  • If used for rainwater collection – consider a filtration system catching leaves and dust

 

Investing in the right drinking water storage tank / potable water tank is a long-term solution that ensures safety, sustainability, and autonomy. Do not underestimate any aspect – from material selection to capacity and installation location. Consult our specialists, compare different options, and choose a solution that meets your needs today and in the future.

Here you can also explore our ready-made solutions that include everything necessary for water supply for your property:

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