GARANTIA Modular system

Put your system together individually from four components:

Cristall underground tank

  • incl. PE lid walk-in 1,600 l or 2,650 l
  • Recommended for garden irrigation
  • Easy to transport due to low weight from 65 kg (size 1,600 l)
  • Only one tank cover in the garden due to integrable filter technology
  • Pre-assembled lip seals for quick and safe installation
  • Groundwater stable up to 500 mm from tank bottom

Columbus underground tank

  • incl. PE lid accessible 3,700 l, 4,500 l and 6,500 l
  • Recommended for rainwater utilisation in house and garden
  • Only one tank cover in the garden due to integrable filter technology
  • Pre-assembled lip seals for quick and safe installation
  • Groundwater stable up to 800 mm from tank bottom

Telescopic dome shaft Cristall

The Cristall telescopic dome shaft has three pre-mounted DN 100 lip seals and is infinitely telescopic/shortenable. The telescope can also be tilted by 5°. This allows you to comfortably adjust your tank cover to your terrain surface with millimetre precision.

Telescopic dome shaft Columbus

The Columbus telescopic dome shaft is infinitely telescopic/shortenable. The telescope can also be tilted by 5°. This allows you to comfortably adjust your tank cover to your terrain surface with millimetre precision.

Tank cover passable (optional)

The max. axle load is 2.2 t and the max. vehicle weight is 3.5 t.
Car module consisting of a cast cover and a cast frame.


Filter removal package 1

  • Fitter basket for hanging in the tank dome
  • Fine-mesh filtration (Ø 0.035 cm)
  • Also ideal for retrofitting existing systems
  • Traverse adjustable from 47-69 cm
  • Roof area max. 200 m²
  • 100% water yield

Cristall and Columbus extension package

If required, the Cristall or Columbus series underground tanks can be equipped with integrated filter technology at low cost. The Supra-Filter provides you with a water quality that allows the rainwater to be used for toilet flushing and washing machines.

  • Supra-Filter Internal with straight (Cristall) or curved (Columbus) outlet
  • Patented quick-fit collar for pipe-to-pipe connection
  • Overflow siphon with small animal protection function 
  • Calmed inlet siphon

Garden package PROline

  • Digital level indicator
  • Stainless steel submersible pump
  • External water socket
  • Pressure hose

House package PROline

  • Drinking water feeding module
  • Floating withdrawal
  • Labelling set
  • Wall duct DN 100
  • Suction hose