Accessories for water tanks & rainwater containers Filters · connections · pumps · smart control · infiltration – from Roth
Original Roth accessories for rainwater tanks, house storage, Twinbloc® and underground storage – from the simple special seal to the complete smart control with app connection. Downpipe filter, extension-package filter, floating extraction, submersible pump, infiltration tunnel, car-driveable shaft cover and drinking-water top-up.
Filters – clean water in the tank
Rainwater from the roof contains leaves, bird droppings and fine dirt – without filtration, the quality in the tank drops. Two approaches: downpipe filters (plastic from €120, metal €280) filter directly at the downpipe before the water enters the tank. Extension-package filters (garden filter €129, ECO filter €265) sit in the dome shaft of the underground storage tank. Smart filter monitoring (€85) reports the degree of soiling of the filter basket via a sensor.
Connections & couplings
The Roth accessory range offers all connections for system integration: special seals DN 50/100, PP flanges 1", screw connections DN 50, universal flange-connection elbows 1" and 2" as well as the connection set with hole saw and special seals for coupling several underground storage tanks via DN 100 sewer pipe. The DEHOUST barrel connection set for above-ground garden butts is also available.
Water extraction & pump
The floating extraction for Twinbloc® (€152) draws water from the cleanest layer – not from the bottom with sediment. With a PE float ball, suction filter and integrated check valve. The Roth submersible pump (€470) delivers up to 5.7 m³/h at max. 20 m system head and 3.6 bar – ideal for pressure supply in the house. The garden connection set (€85) contains 12.5 m PE pipe, ball valve and hose connection 1/2".
Smart control & infiltration
The Roth smart control (€625) monitors the fill level via a sensor and free app and automatically controls the drinking-water top-up. The smart drinking-water top-up (€520) automatically tops up drinking water when the rainwater tank is empty. The infiltration tunnel package (€534) infiltrates 1300 litres of overflow water into the ground – completely wrapped in geotextile, ready for installation.
Roth Special Seal DN 50
- Nominal size: DN 50
- Required hole: 54 mm
- Suitable pipe: HT pipe DN 50
- Special seal for HT pipe DN 50
- Required hole 54 mm
Delivery time: 1-3 days
Roth Special Seal DN 100
- Nominal size: DN 100
- Required hole: 118 mm
- Suitable pipe: HT/KG pipe DN 100
- Special seal for HT/KG pipe DN 100
- Required hole 118 mm
Delivery time: 1-3 days
Sickertunnel Endplatte
Delivery time: 1-3 days
Roth PP Flange 2"
- PP flange with 2" connection
- For all Roth tanks with lower flanges
- Base for connection pipe or valve
- Polypropylene, corrosion-free
- Simple screw-on installation
Roth PP Flange 1"
- Size: 1"
- Material: Polypropylene (PP)
- Suitable for: Roth tanks with bottom flange connections
- Polypropylene (PP) flange
- Connection size 1"
Delivery time: 1-3 days
Roth Screw Connection DN50 - Ideal for 750-3000L Home and Industrial Tanks
- Nominal size: DN 50
- Suitable for: Roth house, industrial and garden tanks 750 - 3000 l
- Screw-on DN 50 inlet connection
- For Roth house, industrial and garden tanks 750 - 3000 l
- Matches the DN 50 outlet of the Roth plastic downpipe filter
Delivery time: 1-3 days
Roth Mechanical Level Indicator
- Suitable for: Roth house tanks 750/1500/2000 l, all garden tanks, industrial tanks 2000/3000 l
- Mechanical indicator without power supply
- For house tanks 750 l, 1500 l and 2000 l
- For all Roth garden tanks
- For industrial tanks 2000 l and 3000 l
Delivery time: 1-3 days
Roth Universal Flange Connection Elbow 1"
- Size: 1"
- Connections: Compression fitting for PE water pipe
- Suitable for: Roth tanks with bottom flange connection
- 1" elbow connection for the bottom flange connection
- Compression fitting for PE water pipe
Delivery time: 1-3 days
Roth Ventilation and Aeration Unit for Drainage Block
- Dimensions (L x W x H): 280 x Ø 110 mm
- Empty weight: 0.4 kg
- Connections: KG-Rohr DN 100
- Ventilation of Roth infiltration systems
- Connection to KG pipe DN 100
Delivery time: 1-3 days
Roth Flange with 1" Ball Valve
- Connections: Ball valve 1" male thread
- Suitable for: Roth house / industrial tanks 750 - 3000 l
- Flange with integrated ball valve
- Ball valve with 1" male thread
- For Roth house and industrial tanks 750 - 3000 l
Delivery time: 1-3 days
Roth Universal Flange Connection T-Piece 1"
- Flange connection T-piece 1"
- With compression fitting for PE water pipe
- For lower flange connections on Roth tanks
- For coupling several tanks
- Tool-saving, releasable installation
DEHOUST Barrel Connection Set with Drill 971341, for Linking DEHOUST Garden Water Butts and Garden Tanks
- Suitable for: DEHOUST garden water butt 150 l and 220 l, garden tank 500 l, 750 l and 1,000 l
- Content: drill bit, connecting hose, 2 × hose nipple with threaded connection, 2 × lock nut, 2 × seal
- Complete set for connecting two DEHOUST garden water butts or garden tanks
- With drill bit for the connection holes
- Connecting hose, 2 hose nipples with threaded connection, 2 lock nuts, 2 seals
Delivery time: 1-3 days
Roth Screw Connection for Submersible Pump
- Connections: Hose tail 1", compression fitting for PE water pipe 1"
- Suitable for: Roth house, industrial and garden tanks
- 1" hose tail combined with PE compression fitting
- Screws directly onto the upper threaded connection of the tank
- For the delivery line of a submersible pump
Delivery time: 1-3 days
Base for Rain Barrel 50/80 Liters Brown
Roth Connection Accessories for Expansion Home Storage
- Suitable for: Roth extension house tank, garden tanks up to 1500 l
- Flange connection T-piece
- Vent cap with 2" male thread
- Seal and screws
- Also for connecting Roth garden tanks up to 1500 l
Delivery time: 1-3 days
Roth Universal Flange Connection Elbow 2"
- Size: 2"
- Connections: Compression fitting for PE water pipe
- Suitable for: Roth tanks with bottom flange connection
- 2" elbow connection for the bottom flange connection
- Compression fitting for PE water pipe
Delivery time: 1-3 days
Sickertunnel 333 Liter
Delivery time: 1-3 days
Roth Filter Basket
- Mesh size: 1 mm
- Filter basket for installation in the tank shaft system
- Mesh size 1 mm
- Removal and cleaning via the dome shaft
Delivery time: 1-3 days
Roth Overflow Siphon with Small Animal Barrier
- Suitable for: Roth underground tanks (DN 100 overflow)
- Optimal removal of the upper floating layers in the tank
- Small animal barrier against e.g. mice
- For retrofitting and as a spare part for Roth underground tanks
Delivery time: 1-3 days
Base for Rain Barrel 120/140/150 Liters Brown
Roth Connection Set for the Garden
- Connections: 1/2"
- Length: spiral pressure hose 12.5 m
- Small ground box Ø 150 mm with lid
- 1/2" hose connection with ball valve
- 12.5 m spiral pressure hose to connect pump and tap point
Delivery time: 1-3 days
Roth Universal Flange Connection T-Piece 2"
- Flange connection T-piece 2"
- With compression fitting for PE water pipe
- For lower flange connections on Roth tanks
- For coupling several tanks
- Tool-saving, releasable installation
Roth Connection Accessories for Basic Home Storage System
- Suitable for: Roth base house tank, garden tanks up to 1500 l
- Flange connection elbow
- Shut-off valve with flange
- Hose tail, seal and screws
- Also for connecting Roth garden tanks up to 1500 l
Delivery time: 1-3 days
Roth Smart Filter Monitoring 1135010924 – Sensor for Rainwater Systems
- Produkt: Roth Smart Filterüberwachung
- Ausführung: Filtersensor
- Funktion: Überwachung des Verschmutzungsgrads
- Lieferumfang: Anschlusskabel und Befestigungsmaterial
- Montage: Installation im Filterkorb
Delivery time: 2-5 days
The right accessories for your rainwater system
Downpipe filter or extension package?
Downpipe filter (plastic/metal): sits at the downpipe and filters water before it enters the tank. Simple, retrofittable, for pipes DN 80–100. Extension package garden filter: filter basket in the dome shaft of the underground storage tank – sufficient for garden irrigation (1 mm mesh). ECO filter: a more extensive system with DN 100 inlet calming and a dirt-trap basket in the tank – for roof areas up to 200 m² and building-services use. For toilet and washing machine, always choose the ECO filter.
Floating extraction – why important?
Sediment, fine dust and suspended matter collect at the bottom of the rainwater tank. A fixed suction line at the bottom would pump these turbid substances directly into the house installation. The floating extraction has a float that always keeps the suction opening in the middle water zone – where the water is clearest. The integrated check valve prevents the suction line from running empty between extractions.
Roth smart control – what can it do?
The smart control (€625) monitors the fill level in the tank via a sensor (20 m data cable), shows the fill level via a free app on the smartphone and automatically controls the drinking-water top-up. This way the tank is never empty – even after long dry periods. The app also reports the degree of soiling of the filter (in combination with the smart filter monitoring €85). Ideal for fully automated rainwater systems without manual checking.
What is an infiltration tunnel?
An infiltration tunnel is a plastic hollow body that is buried in the ground and allows overflow water from the rainwater tank to infiltrate in a controlled manner. The Roth infiltration tunnel package (1300 L, 2500×2000×500 mm) is completely wrapped in geotextile, which holds back the finest particles and protects the surrounding soil from silting up. The infiltration tunnel is the ecological outlet for excess rainwater – without a sewer connection and without sealing the surface.
Drinking-water top-up – how does it work?
The smart drinking-water top-up (€520) automatically tops up drinking water into the rainwater tank when the fill level falls below a threshold – for example after a long dry period. The top-up valve opens, drinking water flows via the inlet funnel (DN 50) into the tank. The system is designed as a free outlet – the drinking water has no direct contact with the rainwater, and the connection to the drinking-water pipe via a 1/2" armoured hose is permitted under the TrinkwV.
Car-driveable shaft cover
The Roth car-driveable shaft cover (€139) replaces the standard walk-on plastic cover on the Twinbloc® underground storage tank and permits a wheel load of up to 600 kg. This corresponds to the weight per wheel of a normal car (total weight approx. 1200–2000 kg, evenly distributed over 4 wheels). The cover fits shaft DN 600 and enables the tank to be installed under driveways and parking spaces without a separate protective structure.
Frequently asked questions about water-tank accessories
The right accessories for your rainwater system
Our specialist team advises you free of charge – on the right filter choice, pump sizing and smart control for your system.
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