Roth low-profile sealed tanks
Roth's selection of sealed tanks:
- Roth Twinbloc® 1500 sealed tank, LVI No. 3629300
- Roth Twinbloc® 3500 sealed tank, LVI No. 3629301
- Roth Twinbloc® 5000 sealed tank, LVI No. 3629302
- Roth rainwater retention tank 3500 50%, LVI No. 2620800
- Roth rainwater retention tank 3500 100%, LVI No. 2620801
- Roth rainwater retention tank 5000 50%, LVI No. 2620802
- Roth rainwater retention tank 5000 100%, LVI No. 2620803
You can find the full selection and prices in our price list
Roth Twinbloc® tank
Roth Twinbloc® Tanks: The Market’s Lowest Profile
The Roth Twinbloc® tanks have the lowest profile on the market, with a frame height starting at 695 mm. Their low dual-structure design makes them particularly suitable for challenging locations that require shallow installation depths. Thanks to their shape, excavation costs are lower compared to traditional tanks, and only two anchoring straps are needed. These tanks can also be installed in areas with high groundwater levels. They are lightweight and feature built-in handles for easier installation.
The tanks are manufactured from PE-HD plastic using blow molding technology in a single piece. Since the method does not require seams, the result is a cost-effective and high-quality product.
Warranty: Roth Twinbloc® tanks come with a 10-year warranty.
- Country of Manufacture: Germany
The Roth Twinbloc® sealed tanks feature a telescopic DN200 drainage shaft with a durable plastic cover. Multiple tanks can be easily connected in series using 110 mm ground sewage pipes and a connection kit. The tanks also have several flat connection points, allowing necessary openings to be made on-site.
Roth Twinbloc® Rainwater harvesting
Roth Twinbloc® Rainwater and Stormwater Retention Tanks
Roth Twinbloc® rainwater and stormwater retention tanks are available with either 50% or 100% retention capacity. By selecting the 50% retention option, half of the tank’s volume can be used for stormwater retention, while the remainder can serve the property’s rainwater needs, such as garden irrigation or car washing.
Roth Twinbloc® retention tanks feature a telescopic DN600 maintenance shaft with a durable plastic cover. Their low-profile design provides a large retention volume with minimal elevation, allowing for optimal pipe slope availability. Each tank comes equipped with an easy-to-empty inlet filter basket, an adjustable retention valve, and a float mechanism that prevents the drainage hose from resting on the tank bottom. The outflow rate of retained water can be adjusted between 0.07–0.5 l/s.
The system can be expanded by connecting multiple tanks in parallel or in series, with only the last tank in the series fitted with a retention valve. Each tank has multiple flat connection points, allowing necessary openings to be made on-site. Connections can be established using a 110 mm ground sewage pipe and a universal penetration kit.
Recommended Tank Sizing
- 100 m² impermeable surface (roof, asphalt) = 1 m³ retention volume
- 100 m² green area = 0.3 m³ retention volume
Example: A property with a 100 m² building footprint and a 500 m² green area would require a 2.5 m³ retention volume.
An optional vehicle-resistant maintenance cover is also available as an accessory.
