Rainwater tanks 50 to 10,000 litres – garden butts, house storage & flat storage Twinbloc®
Rainwater tanks for every need: simple garden butts and rain barrels from 50 litres, slim DEHOUST garden tanks up to 1000 litres, modular Roth house storage tanks for garden irrigation and toilet flushing, and the underground Roth Twinbloc® flat storage tank (1500–10,000 L, car-driveable, connectable) for professional rainwater use in the house and business.
Garden butts & garden tanks
Simple above-ground rainwater collectors for garden irrigation – from small rain barrels (50 L) through classic DEHOUST plastic butts (150–220 L) to larger garden tanks (500–1000 L). Slim, tall design, UV-resistant PE, simple connection to the downpipe. No installation, no fitting – ready to use immediately.
Roth house storage – for garden & house
The Roth house storage tanks (750–2000 L) are designed for domestic rainwater use – not only for the garden, but also for toilet flushing and laundry water. Available as a base (with a DN 50 inlet and overflow siphon) or extension, installable above and below ground. Green PE with steel bands, opaque to prevent algae growth.
Roth Twinbloc® – underground & car-driveable
The Roth Twinbloc® flat storage tank is designed for full underground installation – with 1500 to 10,000 litres capacity, car-driveability, a DN 600 dome shaft and an optional integrated filter basket. Several Twinbloc tanks can be connected via a DN 100 sewer pipe. The standard solution for professional underground rainwater use in residential construction.
Roth industrial storage – for trade & businesses
The Roth industrial storage base tanks (2000 L and 3000 L) are flat-rectangular large storage tanks with a DN 100 inlet and overflow siphon for commercial rainwater use in car washes, nurseries and businesses. Modularly expandable with additional tanks. Also available in the Industrial Water Tank category.
Regenfass 50 Liter Wasserfass Gartenfass
Delivery time: 2-5 days
DEHOUST Rainwater Garden Water Butt 150 l, Dark Green, UV-Stabilised HD-PE, with Tap Hose and DN 400 Lid
- Capacity: 150 l
- Dimensions (Ø × H): Ø 497 × 960 mm
- Material: HD-PE, high-molecular, UV-stabilised
- Capacity 150 l
- UV-stabilised high-molecular HD-PE in dark green
Delivery time: 1-3 days
Regentonne konisch 130 Liter Wasserfass Gartenfass
Delivery time: 2-5 days
DEHOUST Rainwater Garden Water Butt 220 l, Dark Green, UV-Stabilised HD-PE, with Tap Hose and DN 400 Lid
- Capacity: 220 l
- Dimensions (Ø × H): Ø 580 × 1,000 mm
- Material: HD-PE, high-molecular, UV-stabilised
- Capacity 220 l
- UV-stabilised high-molecular HD-PE in dark green
Delivery time: 1-3 days
DEHOUST Rainwater Garden Tank 500 l, Dark Green, UV-Stabilised HD-PE, with Tap Hose and DN 400 Lid, Strainer Cap
- Capacity: 500 l
- Dimensions (L × W × H): 880 × 720 × 1,080 mm
- Material: HD-PE, high-molecular, UV-stabilised
- Capacity 500 l
- UV-stabilised high-molecular HD-PE in dark green
Delivery time: 1-3 days
DEHOUST Rainwater Garden Tank 750 l, Dark Green, UV-Stabilised HD-PE, with Tap Hose and DN 400 Lid, Strainer Cap
- Capacity: 750 l
- Dimensions (L × W × H): 880 × 720 × 1,610 mm
- Material: HD-PE, high-molecular, UV-stabilised
- Capacity 750 l
- UV-stabilised high-molecular HD-PE in dark green
Delivery time: 1-3 days
Roth Rainwater Home Storage Tank 750 to 2000 Liters
- Material: HDPE, green
- UV-resistant HDPE, light-proof green – prevents algae growth
- For above-ground installation inside buildings
- Upper screw connections with 2" female thread, bottom flange connection
- Connection of several tanks with Roth connection accessories (60 mm gap) or universal flange elbows/T-pieces
Delivery time: 2-5 days
750 Liter Rainwater Tank Garden Storage ROTH Water Barrel Rain Barrel
- Capacity: 750 liters
- Dimensions: 730 x 730 x 1660 mm
- Inspection Opening: Ø 150 mm
- Weight: 25 kg
Delivery time: 2-5 days
1000 Liter Rainwater Tank Garden Storage ROTH Water Barrel Rain Barrel Garden Barrel
- Volume: 1000 liters
- Container Dimensions (LxWxH): 1240 x 720 x 1250 mm
- Material: Polyethylene, UV-resistant and rot-proof
- Weight: 36 kg
Delivery time: 2-5 days
DEHOUST Rainwater Garden Tank 1,000 l, Dark Green, UV-Stabilised HD-PE, with Tap Hose and DN 400 Lid, Strainer Cap
- Capacity: 1,000 l
- Dimensions (L × W × H): 1,050 × 770 × 1,750 mm
- Material: HD-PE, high-molecular, UV-stabilised
- Capacity 1,000 l
- UV-stabilised high-molecular HD-PE in dark green
Delivery time: 1-3 days
1500-Liter Rainwater Tank Garden Storage ROTH Water Barrel Rain Barrel Garden Barrel
- Capacity: 1500 liters
- Container Dimensions (LxWxH): 1880 x 720 x 1480 mm
- Weight: 59 kg
- Material: UV-resistant polyethylene
Delivery time: 2-5 days
2000-Liter Rainwater Tank Garden Storage ROTH Water Barrel Rain Barrel Garden Barrel
- Container Dimensions (LxWxH): 2020 x 880 x 1650 mm
- Volume: 2000 liters
- Material: Polyethylene
- Weight: 92 kg
Delivery time: 2-5 days
Rainwater - Flat Storage Twinbloc 1,500 to 10,000 Liters
- Nominal capacity: 1500 / 3500 / 5000 / 7000 / 10,000 litres
- Material: PE
- Dome shaft: DN 600
- Monolithic, seamless PE tank, stable in the ground
- DN 600 dome shaft (700 mm, extendable) with walk-on plastic cover, pushed into the tank on delivery
Delivery time: 2-5 days
2000 Liter Industrial Rainwater Storage Tank Base
- Nominal capacity: 2000 litres
- Dimensions (L x W x H): 2020 x 880 x 1650 mm
- Inspection opening: oval 500 x 400 mm
- DN 100 inlet with inlet calming
- DN 100 overflow siphon with integrated small animal barrier (connections on the end faces)
Delivery time: 2-5 days
3000 Liter Rainwater Tank ROTH Garden Storage Water Barrel Rain Barrel Garden Barrel
- Capacity: 3000 liters
- Material: Polyethylene (rot-proof and UV-resistant)
- Dimensions: 2630 x 880 x 1650 mm
- Weight: 122 kg
Delivery time: 2-5 days
3000 Liter Rainwater Tank Industrial Storage Base
- Nominal capacity: 3000 litres
- Dimensions (L x W x H): 2630 x 880 x 1650 mm
- Inspection opening: oval 500 x 400 mm
- DN 100 inlet with inlet calming
- DN 100 overflow siphon with integrated small animal barrier (connections on the end faces)
Delivery time: 2-5 days
The right rainwater tank for your needs
Which tank for which purpose?
Garden irrigation only: rain butt or garden tank (50–1000 L) – cheap, above-ground, no installation. Garden + toilet + washing machine: Roth house storage (750–2000 L) with a domestic waterworks unit – semi-professional. Full rainwater use in the house: Roth Twinbloc® underground (1500–10,000 L) with filtration and pressure pump – professional system. Trade and industry: Roth industrial storage base.
How much volume do I need?
As a guide value: 1 m² of roof area supplies about 0.8 litres of usable water per litre of precipitation. A house with a 100 m² roof and 600 mm annual precipitation: about 48,000 litres/year = 130 litres/day. For pure garden irrigation, 500–1500 L is enough to bridge dry periods. For toilet + garden in a single-family house: 2000–5000 L. For full house supply: 5000–10,000 L.
Why green or black PE?
Algae need light to grow. Transparent or light-coloured tanks encourage algae blooms – the water becomes cloudy and smells. Green PE (Roth garden and house storage): opaque, prevents algae growth, visually unobtrusive in the garden. Black PE (AquaBank®): also light-tight. Both colours fulfil the same protective function – no chemical algicide use needed.
Twinbloc® – what does car-driveable mean?
After installation in the ground, the Roth Twinbloc® can be driven over by cars – the tank withstands the loads of a passenger car without deformation. This also allows installation under driveways, parking areas and garden entrances, where no free space has to be sacrificed for the tank. The standard Twinbloc® is not designed for truck loads – for that there are heavy-duty variants.
Connecting several Twinbloc® tanks
Several Twinbloc® containers can be connected to existing drilling surfaces with a DN 100 sewer pipe – the water equalises between the tanks. The Roth connection set (hole saw + two special seals DN 100) enables easy connection on site. This allows the capacity to be increased step by step without having to replace the entire tank.
Filter – inlet filter and filter basket
Rainwater from the roof contains leaves, bird droppings and fine dirt – without filtration these get into the tank and worsen the water quality. The Twinbloc® is optionally available with an integrated filter basket in the dome shaft. For house supply (toilet, laundry), an external inlet filter is additionally recommended. The house storage tank has a DN 50 inlet with inlet calming.
Frequently asked questions about rainwater tanks
The right rainwater tank for your house or business
Our specialist team advises you free of charge – on volume, type of installation, filtration and the optimal solution for your rainwater use.
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