GRP Underground Tanks

Underground tanks

Underground polyester tanks

The GRP tanks (fibreglass reinforced plastic) are ideal for underground installation, due to the total absence of corrosion. We manufacture underground tanks in all dimensions. Upon the customer's request, they can be calculated for special conditions of greater depth, vehicle passage, high water table, etc.

All tanks are calculated according to the European EN-13121 standard, but we can also design them according to other standards (ASME, API, etc.) upon request.

In addition to the standard water tanks, they can be designed and manufactured to contain any other product.

They can be manufactured in horizontal or vertical format, depending on specifications and available space.


  • 2 GRP flanges DN 50, DIN 2501

  • PVC 110 vent

  • PP manholes

  • Lifting lugs

  • Chemical barrier: isophthalic resin

  • Mechanical reinforcement: orthophthalic resin

  • Designed according to the UNE 13121 standard

  • Different length and diameters

  • Other resin and fibre according to pH level, temperature, etc.

  • Additional flanges and manholes

  • Accessories: sensors (level, temperature, etc), alarms, electrical panels, etc.

  • Seismic and wind calculations

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