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Downpipe filter for your rainwater system

Even before the water reaches the rain barrel or cistern, it is cleaned of leaves and dirt in the downpipe filter.

For this purpose, the downpipe filter is inserted directly into the downpipe and connected to the rainwater storage tank.

Below you will find our downpipe filters. Feel free to take a look around!

This is how the WISY downpipe filter works:

While coarse leaves, foliage or similar impurities fall down the centre of the downpipe, water follows the inner walls of the pipe. In the WISY downpipe filter, the rainwater is pulled sideways by means of adhesion force and can directly be stored in the rainwater storage tank.

The dirt continues to fall downwards and is ejected there or flushed directly into the sewer. Clogging of the downpipe filter is not possible, as the inner diameter does not narrow at any point in the filter. For dirt, the downpipe filter therefore simply behaves like a piece of pipe.

Tip
Filter collector FS
€199.92*

Product information

Filter collector FS

The filter collector FS filters the rainwater directly in the downpipe before it is drained to the side in the direction of the cistern or a rain barrel. Its filter insert consists of fine stainless steel mesh with a mesh size of only 0.28 mm. This reliably separates leaves, moss and other washed-in debris and flushes those downwards into the waste water pipes.

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Info Important details

Filters rainwater from up to 200 m² roof area (temperate climate zone) Made of stainless steel or copper Easy to retrofit For rainwater downpipes in all common diameters Low maintenance, because it is self-cleaning

Product information

Rain collector RS

The RS rainwater collector is installed in the vertical downpipe. It filters the rainwater flowing in from above before diverting it to the side of the cistern. The mesh size of the stainless steel filter insert is only 0.28 mm. Leaves, moss and other debris are separated by the rainwater collector and flushed downwards into the drain.

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InfoImportant details

Rain collector for the downpipe Low maintenance Stainless steel filter insert UV-resistant plastic housing For roofs up to 200 m2 area

Product information

Garden rain collector

The Garden Rainwater Collector GRS filters the rainwater directly in the downpipe before it is drained to the side in the direction of the cistern or a rain barrel. Its filter insert consists of fine stainless steel mesh with a mesh size of only 0.44 mm. This reliably separates leaves, moss and other washed-in debris and flushes those downwards into the waste water pipes.

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InfoImportant details

Rainwater filter for Downpipes Winterproof, frost resistant Automatic overflow Delivers filtered rainwater for all garden purposes

Product information

RainCatcher RC

The RainCatcher RC is installed in the vertical downpipe. It directs the rainwater flowing in from above to the side of the rainwater barrel. Thanks to its special design, the RainCatcher RC separates coarse debris such as leaves or moss and flushes it through the downpipe directly into the drain. The collected rainwater is very suitable for watering the garden.

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InfoImportant details

Simple installation Overflow protection for the rain barrel Ideal for all rainwater barrels 5-year guarantee Low maintenance

Product information

Standpipe filter collector STFS

The standpipe filter collector is both a standpipe and a filter collector. It filters the rainwater directly in the downpipe before it is drained to the side in the direction of the cistern. Its filter insert consists of fine stainless steel mesh with a mesh size of only 0.28 mm. This reliably separates leaves, moss and other washed-in debris and flushes those downwards into the waste water pipes.

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InfoImportant details

Standpipe with integrated rainwater filter For 200 m² roof area (moderate climate zone) Completely made of stainless steel Very low-maintenance, because it is self cleaning

Why a downpipe filter is important

Without a downpipe filter, dirt particles can get into the rainwater storage tank. e.g. these could be leaves from trees, moss from the roof or dead insects. This is organic material that decomposes over time and becomes a nutrient for microorganisms.

As in a pond with too high a nutrient input, this, in combination with a lack of oxygen, may lead to unpleasant odours. Coarse contamination can also block the tap or damage a pump.

A downpipe filter protects you from all this: it removes organic substances from the rainwater before they reach the rainwater barrel or rainwater storage tank.

Downpipe filter

WISY downpipe filter, rain flap or leaf separator?

In the past, a simple rain flap or occasionally a leaf separator was often used to collect rainwater. However, a downpipe filter is far superior to both.

These are the advantages of the WISY downpipe filters compared to leaf separators or rain flaps.

Downpipe filter vs. rain flap

The rain flap diverts the entire water flow with all the dirt and allows the rainwater to splash into the container until it overflows. The collected water thus contains all the dirt that has been rinsed off the roof. When the container is full, the water overflows uncontrollably and floods the surrounding area. Only when the rain flap is closed manually does the flow into the container stop. If the rain flap is forgotten to be opened again, the container will remain empty the next time it rains.

The rain flap is also usually used in combination with open collection containers or rain barrels, which have their own disadvantages and risks. Additional dirt, e.g. leaves, falls directly into the barrel, mosquito larvae swim there in summer and, in the worst case, they also pose a danger to children at play. WISY therefore recommends using closed rain barrels.

Downpipe filter vs. leaf separator

The leaf separator can divert very coarse soiling, but after a short time it also diverts a considerable portion of the water flow, as dirt gets stuck in the separator and the water can no longer flow completely towards the container. If the connected container becomes full, it then overflows uncontrollably and floods the area surrounding the container. Leaf separators can be useful if the aim is to reduce the amount of dirt entering the connected wastewater pipes. For cases in which the rainwater is not to be used.

With WISY downpipe filters the rain barrel does not overflow

If the rain barrel is full, the water is diverted downwards in the correctly installed WISY downpipe filter so that the barrel cannot overflow. With both the rainwater flap and the leaf separator, on the other hand, a full rainwater barrel would overflow because there is no hydraulic coupling of the water level between the rainwater storage tank and the downpipe filter.

Garden rain collector

Downpipe filter

for each downpipe

Diameter of downpipe and downpipe filter

The diameter of the downpipes is determined by the planner so that rain that falls on the roof surfaces can always run off. Like the downpipes, every rainwater filter must also be sufficiently large so that it does not become an obstacle during heavy rainfall.

The applicable standard for rainwater harvesting systems defines that there must be no constriction at any point in the rainwater filter, as otherwise dirts can collect there and form a blockage. This rule also applies to downpipe filters. All WISY filters fulfil this requirement. WISY downpipe filters are suitable for all standard downpipe diameters from 76 mm to 120 mm.

To ensure that the downpipe filter fits your downpipe, WISY offers several versions of each downpipe filter for different pipe diameters. This means you will find the right model for all standard downpipes so that the downpipe filter and downpipe fit together and the filter works perfectly. By their design a blockage of your downpipe is impossible with WISY downpipe filters.

What is important when installing the downpipe filter?

In order to achieve an optimum water yield, the water coming from above should be able to flow further along the inner wall of the pipe as it enters the downpipe filter, from where it is filtered and discharged to the container. To do this, the burr created during sawing should be removed with a file.

Need advice now ?

for downpipe filter and rainwater system

If you are unsure about the choice of downpipe filter or have questions about your planned rainwater system, we will be happy to help you make the right choice.

As an experienced manufacturer for all components of a professional rainwater harvesting system, selecting the right downpipe filter is part of our daily business. Please do not hesitate to contact us.

Our friendly and competent staff will be happy to assist you in finding the right downpipe filter. We look forward to your enquiry and to welcoming you to WISY soon.