RoTerra 1800 — The low-profile underground tank.
Oval shape for installation in shallow ground.
The RoTerra 1800 is a horizontal underground tank of oval (elliptical) shape, made from HDPE. Its low installation profile makes it ideal for shallow ground. Available in 3 capacities — 3.500, 5.000 and 6.000 litres — for rainwater harvesting, irrigation reserve, service water and fire reserve.
Why the RoTerra 1800?
The elliptical design of the RoTerra 1800 gives excellent structural stability and a low installation profile, ideal where excavation depth is limited. The water table can stay stable up to the centre of the tank, and the RoDrive version takes truck traffic up to 40 tonnes.
Thanks to the flat bottom and the fully pre-assembled components, installation is quick and needs less filling. The flat surfaces allow precise, watertight pipe connections from DN50 to DN400.
The RoTerra 1800 advantages at a glance:
Cost efficiency
- ✓Quick installation thanks to the flat bottom
- ✓Less filling required — saves time and money
- ✓Fully pre-assembled components — ready to use
- ✓Lightweight polyethylene — easy to transport
Safety and structural integrity
- ✓Elliptical design for excellent structural stability
- ✓High resistance to soil forces and the water table
- ✓Stable water table up to the centre of the tank
- ✓Suitable for truck traffic up to 40 tonnes (RoDrive option)
- ✓Walk-on, watertight cover (DN50 to DN400)
Sustainability and maintenance
- ✓Durable, corrosion-resistant polyethylene
- ✓Long-lasting watertight construction
- ✓Flat, precise surfaces for secure pipe connections
- ✓Optional access hatch for easy inspection and maintenance
- ✓10-year manufacturer's warranty
The RoTerra 1800 in detail
- 1Walk-on coverAn integrated seal keeps it watertight. Hinged, opens without tools. Load 0,2 kN/m² (walk-on).
- 2Flat surface for pipe connectionsAllows precise, watertight connections.
- 3Connection optionsInlets and outlets from DN50 to DN400, configurable per project.
- 4Reinforcing ribsStructural stability and protection against deformation. Wall thickness 8–14 mm.
- 5Telescopic inspection shaftØ600 × 300 mm — adjusts without tools to different ground levels, integrated thread.
Dimensions and technical details
* Indicative measurements. See the datasheet for full specifications. Prices exclude VAT at 23%. Subject to change without notice.
Options and accessories
Do you need a RoTerra 1800 for your project?
Our team replies within one working day with a technical and commercial proposal.