rain water storage tankrain water storage tank

Rain water storage tank

We have designed flexible tanks that allow you to collect rainwater: the rain water storage tank.  You just have to place the tank next to your house and connect it to the downspouts with hoses. Placed outside, the tank can reach a large storage capacity (up to 1200m3). 

This solution has many ecological advantages. Indeed, installing a rainwater harvesting system reduces the use of drinking water and thus preserves the planet!

This rain water storage tank also has an economic advantage: you will save up to 50% of your water consumption. 

Rainwater can be used for many applications: 

  • Supply of water to the house for sanitary purposes
  • Watering of green spaces for horticulturists and nurserymen
  • Feeding ponds or swimming pools 
  • Cleaning of vehicles
  • And many more!

In addition, collecting runoff water is important to avoid the risk of flooding (see our inflatable anti-flooding system). 

Economical, ecological and durable, PRONAL’s flexible tanks, specially designed to fit your home, are the ideal solution for rainwater harvesting.  

It also has the same advantages as our other flexible tanks:

  • Its installation is quick and simple and does not require a building permit (depending on the size of the tank).
  • It is easily transportable,
  • easy to clean
  • and made of highly resistant coated fabrics,
  • Allowing for no evaporation of water
  • And no pollution of the water by external elements such as insects or leaves
  • etc..

This rain water storage tank can also be used as a water reserve on construction sites.



  • Cost-effective
  • Environmentally friendly
  • Long service life


  • Constant volume, no evaporation
  • No outside pollution: insects, leaves, etc.
  • No micro-organism growth


  • No building permit
  • Quick and easy deployment
  • Can be moved

Detailed information

  • Material: high resistance 1300 gr/m2 cloth
  • Coating: double-sided PVC
  • Dimensions: standard and custom made under request > contact us
  • Assembly: high-frequency welding
  • Temperature resistance: -30°C to + 70°C
  • Accessories:
    • 1 DN 140 welded vent to screw-in with gas release valve
    • 1 DN 80 elbow overflow with symmetrical connector and cap
    • 1 DN 50 PPG quarter-turn guillotine valve assembly + DN 50 symmetrical connector and cap
    • 4 reinforced corners
    • 1 repair kit
    • thermal valve protector

Technical informations

Ref. Volume (m3) Dimensions (mm) Weight (kg) Packaging (mm) Side filling/draining Overflow
C5EB5 5 2960x3510x800 27 1020x620x635 2 x Ø2’’ 1 x Ø2’’
C5EB10 10 2960x5650x900 41 1235x820x550 2 x Ø2’’ 1 x Ø2’’
C5EB20 20 4440x6200x1100 65 1235x820x750 2 x Ø2’’ 1 x Ø2’’
C5EB50 50 5920x9530x1300 129 1235x820x960 2 x Ø2’’ 1 x Ø2’’
C5EB100 100 8880x10750x1500 216 1340x940x1080 2 x Ø3’’ 1 x Ø3’’
C5EB250 250 10360x20410x1500 475 2170x1260x1380 2 x Ø3’’ 1 x Ø3’’
C5EB500 500 19240x22060x1500 960 2200x1700x1000 2 x Ø3’’ 1 x Ø3’’

You can not find your dimensions

Our design department employs the best project leaders and designers and will be pleased to develop and create a tailor-made product specially for your unique project.


Composition / Advice

Care during use
Avoid any contact with surfaces that are too abrasive or have cutting edges. Never exceed the product’s rated capacity. Refer to the installation manual.
Maintenance advice
Refer to the Installation manual.
Storage advice
Store always in its original box, away from light, humidity and temperature variations.
Filling advice
Refer to the installation manual.

Standards / regulations

ISO 9001, ISO 140001, ISO 45001


Fact Sheets / Business Guides
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