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Best selling Rainwater tanks + Underground tanks

Here’s a ranking of the best selling Rainwater tanks + Underground tanks. To give you a quick overview, we’ve added the most important information about each product. This page always stays fresh and updates automatically.

1. Graf IBC SK adapter

The IBC SK adapter from Graf is a practical solution for connecting rain barrels and earth tanks. This adapter allows for a simple and secure connection between a S60x6 (DN50/2 inch) fitting and a 3/4 inch fine thread. With a fixed connection nut of 62 mm, the adapter offers stability and reliability. The quick coupling (SK) ensures easy handling and allows for quick assembly and disassembly. The adapter is made of robust plastic and is ideally suited for use in various applications in gardening and landscaping. It is a valuable addition for anyone needing an efficient water connection.

- Standard adapter from S60x6 (DN50/2 inch) to 3/4 inch fine thread
- Design with fixed connection nut for increased stability
- Includes quick coupling (SK) for easy handling. 

2. Garantia Granite

The Garantia Granit Water Tap Column is an elegant and functional solution for water extraction in the garden. It impresses with its appealing design, reminiscent of a natural granite column, seamlessly integrating into any garden landscape. This water tap offers a practical connection option from below via a hose connection and is equipped with a chrome outlet tap that allows for convenient water extraction. Installation is straightforward, as the necessary drill holes in the base are already provided. Additionally, the water tap column is particularly UV-stable and weather-resistant, ensuring its durability and functionality under various weather conditions.

- Elegant design in the form of a natural granite column
- Practical connection option from below via hose connection
- Includes chrome outlet tap for convenient water extraction
- Easy installation with pre-drilled base openings. 

3. Graf IBC Rocky

UV protection cover for 1000L IBC with an attractive patterned print and Velcro closure on the front. Visually appealing UV protection suitable for standard 1000L IBCs. The heavy PVC material used in the IBC cover effectively protects your IBC tank and its contents from UV radiation. This also helps prevent algae formation in the tank while enhancing the container's appearance. Access to the IBC valve and level checking is facilitated by the full-length Velcro closure on the front. Due to the varying sizes of IBC caps, this cover does not have a pre-cut opening on the top. Any desired drainage openings can be easily cut to size as needed. Technical specifications: Cover material: 60% polyvinyl chloride (PVC), 40% polyester / Velcro material: 100% nylon, material thickness 400μ. Cleaning instructions: Clean the cover only with a damp cloth. Using cleaners may damage the printed design. 

4. Graf IBC Adapter

IBC Adapter 2 inches with small tap, suitable for connecting common click systems or snap couplings. An ideal accessory for garden irrigation. The small tap is the perfect addition when you need a connection for standard click systems or snap couplings. It connects to a classic S60x6 coarse thread on the tank. Directly screwed onto the outlet of the tank, you can immediately benefit from the advantages of your own water reserves. However, the tap can also be used effectively without snap couplings for filling buckets, canisters, or watering cans. The fine adjustment using the lever handle prevents uncontrolled water flow from your IBC container. Connection to the tank S60x6 (DN50/2 inches) internal thread / coarse. Your measured diameter is 55 - 62 mm. Outlet 1/2 inch click system. 

5. Nature Rain clay

Durable rainwater tank, model column, made of anthracite-colored, whipped, UV-resistant polyethylene with a storage capacity of 450 liters. The rainwater tank can be placed directly on the ground and is equipped with a tap for easily filling buckets and cans. The user can choose on which side to attach the Rainon connection set (available separately). Dimensions: H115 x W77.5 x D57.3 cm. 

6. Harcostar Regenton 168 Liter

The Harcostar rain barrel in green offers a storage volume of 168 liters, making it ideal for watering gardens. Made from durable plastic with at least 75 percent recycled content, this barrel features a child-safe lid for added security, as well as a tap compatible with Gardena hose connections. The design includes a standard opening for connecting an automatic refill system, which can be sealed with a plastic cap when not in use, as well as a winter drainage point at the lower back to prevent frost damage during cold periods. With a height of approximately 75 cm and a diameter of 55 cm, the barrel maintains a sleek appearance while supporting ecological sustainability through water retention. Available in green and anthracite, it can be combined with a stand and accessories for automatic refilling to enable comprehensive garden irrigation. The robust construction ensures long-term reliability in collecting and storing rainwater, reducing dependence on public water supplies for gardening purposes. 

7. 4rain Azura 2in1

4rain Azura 2in1 Rainwater Tank graphite grey - the timeless elegance. This rain barrel impresses in your garden with its simple design and modern anthracite color. At the same time, the container offers maximized usable volume thanks to the low-lying outlet thread of 19 mm (3/4'') and the flat planting bowl. The included stand allows for convenient water extraction via the plastic outlet tap in brass look, also included in the package. Its compact dimensions allow the rainwater tank to blend elegantly and decoratively into your garden design. Opt for sustainable garden irrigation, conserve valuable resources, and most importantly, save money. Start collecting rainwater, which falls freely from the sky. The container offers a storage volume of 120 liters for this purpose. In addition to the option of collecting free rainwater, it also provides a decorative planting opportunity. A robust, removable planting bowl with a depth of 18 centimeters is included. The planting bowl also features an integrated fastening option for using a drainage hose (optional accessory). Particularly robust and durable - weather-resistant materials with high UV protection ensure a long lifespan when used outdoors. Great emphasis is placed on sustainable product design right from the development of a 4rain product. This rainwater tank is made from recycled plastic and is 100% recyclable. Quality "Made in Germany". Note: The container must be completely emptied in winter to prevent frost damage. 

8. House of Marley Marley Rainboy rainwater collector with connection 1 external thread Window grey RAL 7040 NW 105 mm

Marley Rainboy with Filter System and Overflow Stop

The Rainboy does not simply collect rainwater; it passes through a filter system, ensuring that it is cleaned before entering your rain barrel or water tank. With the Rainboy, rainwater can now be utilized even when coarse impurities previously made this impossible. Therefore, the Rainboy is particularly suitable for rainwater harvesting systems. The rain collector operates on the principle of communicating vessels. The rain collector and barrel are connected by a hose piece. Once the water level reaches the maximum fill height, the rainwater flows through the downpipe into the sewage system. It can be installed in rain downpipes made of metal or plastic, even retroactively.

Product details:

Installation in downpipes with a diameter of 87 - 105 mm made of metal and plastic
Color: gray

High efficiency, collection performance. 

9. Graf Rainwater tank " VASO 2 in 1 " zinc grey - 220 l incl. plant tray

Experience the perfect combination of functionality and design with the 4rain Vaso Decor 2in1 rainwater tank in zinc gray. This exceptional rainwater tank impresses with its modern, streamlined design and unique surface texture that enhances your garden. With a generous storage volume of 220 liters, it allows for sustainable and cost-effective garden watering. Utilize free rainwater that falls directly from the sky, conserving valuable resources and saving money. The integrated planting bowl, with a depth of 20 cm, gives you the opportunity to personalize the rain barrel and make it a distinctive highlight in your garden. Whether as a decorative element or a practical water storage solution, the 4rain Vaso Decor excels in both functions. Two integrated threaded connections (19 mm, 3/4") ensure easy water extraction, whether through the included outlet tap or by connecting a hose set (optional). Especially during the frost period, you can conveniently and completely drain the water. Made from high-quality recycled plastic that is 100% recyclable and equipped with high UV protection, this rainwater tank is extremely durable and ideal for outdoor use. Quality "Made in Germany" – a promise of sustainability and longevity. Please note that the container must be completely emptied in winter to avoid damage in case of frost. Delivery includes: rain barrel, planting bowl, filter mat, comfort extraction set for planting bowl 2in1, plastic outlet tap Aqua-Quick in brass look. Note: Container must be completely emptied in winter to avoid frost damage. 

10. Graf Oval drum space-saving 740 x 470 x 660 mm 150 litres

Barrels are oval and space-saving. These barrels are impact and shock-resistant. The fill level is clearly visible from the outside due to the transparent material. They are food-safe and resistant to most acids and alkalis (please inquire). Material: polyethylene. Color: white. Load capacity of the handles is 30 kg per handle. Delivery includes: barrel, 2-part screw lid, diameter 200 mm, outlet nozzle diameter 34 mm, closure cap with seal, and 2 carrying handles. The depicted tap is not included in the delivery. 

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