Our recommendations
Graf Garantia rain thief pro gray
52.95 EURTo the product
| system | classic (rain collector) |
|---|---|
| Downpipe size | DN 100 |
| Roof area | 200 m² |
| material | Plastic, stainless steel |
| Winter operation | Yes |
| colour | Gray |
The rain thief pro from Graf Garantia filters dirt out of the rainwater, fills the rainwater tank automatically and also prevents the tank from overflowing. The model also impresses with the stainless steel sieve and the high water yield of around 95 percent. Further advantages: The distance between the wall and the downpipe only needs to be 16 millimeters and the changeover from summer to winter operation is easy. The rain collector with Downpipe filter harmonizes with a downpipe size of DN 100 and can cope with large roof areas of up to 200 square meters. The flexible connection options are also impressive. The reviewers at Amazon are very satisfied - they describe the rain thief as easy to assemble and extremely functional.
Powermat downpipe filter rain pipe filter w. Leaf trap DN100 Ø110 HT / KG pipes graphite
19.90 EURTo the product
| system | Leaf separator |
|---|---|
| Downpipe size | DN 100 |
| Roof area | k. A. |
| material | plastic |
| Winter operation | Yes |
| colour | graphite colors |
The graphite-colored downpipe filter from Powermat works according to the simple leaf separator principle. It is made entirely of UV-resistant and frost-proof polypropylene - this means that the utensil can remain installed throughout the year, which minimizes the effort. The reviews on Amazon allow the conclusion that this is a high quality product that serves its purpose. The good price-performance ratio is also explicitly praised.
3P leaf separator gray
29.90 EURTo the product
| system | Leaf separator |
|---|---|
| Downpipe size | DN 100 / DN 80 |
| Roof area | k. A. |
| material | plastic |
| Winter operation | Yes |
| colour | Gray |
Like the second-placed model in our comparison, the third recommendation - a version of 3P - also functions as a leaf separator. One of the advantages of the gray downpipe filter is that it can be used flexibly - it harmonizes with the downpipe sizes DN 100 and DN 80. Thanks to the supplied reduction piece, the filter can be quickly adapted to the respective conditions. For winter operation, all you have to do is remove the guide surface and close the green cover. When reading the customer reviews on amazon.de, the impression emerges that the leaf separator "does what it should".
Purchase criteria
Compatibility with downpipe and roof
The downpipe filter must fit into the downpipe of your roof and be designed for the size of the latter. When making a comparison, always pay attention to the manufacturer's information on the size of the downpipe and the roof area. Practical: Some downpipe filters can be used relatively flexibly, i.e. in terms of downpipe size they are suitable for a wider range, for example for a diameter of DN 80 to DN 100. Caution: If too much rainwater flows through the downpipe filter, the water yield is reduced.
system
Classic downpipe filter: A cylindrical filter screen is built into the filter body - either vertically or horizontally aligned. Due to the natural adhesive force, the rainwater flows through the sieve and then reaches the rain tank via a connector. The dirt held in the sieve falls down through the downpipe. It is discharged into the sewer system. This type is also called rain collector or rain thief.
Leaf separator: It is mainly used when there is a deciduous tree in the immediate vicinity of the roof surface and a lot of leaves fall into the downpipe as a result. As with the classic downpipe filter, the rainwater is led through a filter screen and drained downwards, where it flows into the rainwater tank. The leaf separator ejects leaves and dirt to the front.
Cleaning effort
Classic downpipe filters with vertically aligned filter sieves are particularly easy to care for. They are also defined as "self-cleaning" because hardly any dirt remains in or on the sieve. In contrast, downpipe filters with a horizontally aligned filter screen are more complex to maintain, depending on the manufacturer, so they have to be cleaned more frequently. Think in advance how important it is to you to have little maintenance.
material
Most downpipe filters are made entirely of plastic. There are also versions that have individual components made of zinc, copper or stainless steel. Models with a stainless steel sieve are particularly high-quality because they are robust, stable and corrosion-resistant. Downpipe filters, in which not only the filter housing, but also the entire interior area is made of plastic, usually cost at at least, but they generally don't last as long as designs with metal or steel elements and, moreover, are not quite like that functional.
Winter operation
Some downpipe filters can also be used for winter operation. To do this, they must first and foremost be frost-resistant. If such a filter is in winter mode, the rainwater does not flow into the rainwater cistern, but directly into the sewer system. To activate this mode, most models simply close a valve. If necessary, simply read through the operating instructions of the respective manufacturer to find out more about the exact procedure.
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frequently asked Questions
What is a downpipe filter and what is it used for?
A downpipe filter is a pre-filter that you insert into the downpipe for the rainwater that comes down from the roof surfaces Rain barrel or cistern flows to rid of pollution. Downpipe filters are suitable for the Use of rainwater in the garden as well as the use of the water for the toilet and washing machine in the house.
How does a downpipe filter work?
The exact functionality depends on the type of downpipe filter. What all variants have in common, however, is that rainwater flows from the roof into the filter, where the built-in filter screen catches and / or “ejects” impurities. The water filtered and cleaned in this way continues to flow into the Rain barrel or cistern - the filter is connected to the respective rain catcher.
How do I clean a downpipe filter?
Take out the filter screen and splash it with yours Garden hose or - in the case of more stubborn dirt - one high pressure cleaner(€ 99.99 at Amazon *) away. Regular cleaning ensures a consistently high water yield. With classic downpipe filters, it is sufficient to carry out the measure every few months; We recommend shorter cleaning intervals for other models.
Where is the best place to buy a downpipe filter?
Downpipe filters are usually available in all well-stocked hardware stores and garden centers. In addition, amazon.de offers you a large selection of models. There you also benefit from an all-round pleasant shopping experience. Ordering is easy - and items that you are not satisfied with can usually be returned without any problems.
How much does a downpipe filter cost?
Pure downpipe filters without a rain collector (also called rain thief) are available from around six euros. Most of the versions cost no more than about 20 euros. Sets with a rain collector, which is partly made of metal or steel and possibly also acts as an overflow stop for the rain butt, usually cost around 60 euros upwards.
