Rainwater filter
There are rainwater filters from WISY for all fields of application: for the downpipe, for installation in the ground, in the rainwater tank or as a free-standing version.
With the WISY filter principle, the water is directed to the side, while particles simply fall down. Continuously, WISY rainwater filters clean themselves with a very high degree of efficiency.
All WISY rainwater filters
The secret of the WISY rainwater filter
WISY rainwater filters have a vertical filter mesh. Leaves, moss or other solids simply fall past it and are flushed away with a small amount of residual water. We actually change the flow direction of the water through a natural effect, without deflecting or stopping particles and pollutants.
Rainwater filters from WISY do not collect dirt and the filter mesh cannot clog. This is the decisive advantage over filters with an inclined filter mesh or a filter basket.
Efficient rainwater filters
Convince yourself of the high performance: All WISY rainwater filters - whether downpipe, cistern or vortex fine filters - rely on this vertical filter mesh.
The rainwater is efficiently filtered by the filter insert with fine stainless steel mesh. The mesh size of the filter fabric varies and starts at just 0.1 mm (100 µ) and goes up to approx. 1.2 mm. We use 0.28 mm as standard for the rainwater filters.
This ensures that leaves, moss and smaller particles carried along are reliably separated, permanently flushed down the filter fabric and then transported into the sewer or an infiltration trough.
Low maintenance and easy to clean
All WISY rainwater filters are particularly low-maintenance. An inspection twice a year is sufficient. Cleaning is only necessary when required; the filter insert can be easily removed from the housing and cleaned in the dishwasher.
As the filter insert is made entirely of high-quality stainless steel, it is extremely durable and only needs to be replaced after 20-25 years at the earliest, if at all. The housing of each filter is also made of particularly durable material.
A rainwater filter is indispensable
Rainwater filters fulfil the most important function when collecting rainwater. Only if a rainwater filter removes all coarse components in the first step can the further stages function reliably. The rainwater filter represents the first purification stage of the four-stage system for collecting and storing rainwater.
Rainwater filter safety
The open cross-section of the connected pipes is maintained throughout the rainwater filter. This means that even larger solids can pass through unhindered. Even a tennis ball flushed from the roof cannot cause a blockage in the downpipe, as the rainwater filter does not narrow.
Why does the rainwater flow sideways through a vertical filter mesh?
Water has the property of clinging to the walls of a pipe when it runs down it. The reason for this is the force of adhesion. Similar to a drop that hangs on a blade of grass without falling off or condensation that wanders under a sloping tent canvas, the direction of flow of water in the rainwater filter can thus be influenced.
We use this effect in all WISY rainwater filters to divert the rainwater sideways. In doing so, it travels through a fine-meshed mesh made of stainless steel, which filters the rainwater.
This effect does not work on solids and dirt particles. They cannot be deflected to the side and fall to the bottom. There they are washed away.
Due to the vertical arrangement, the filter fabric cannot become dirty or accumulate leaves and foliage. The rainwater filter remains continuously clean, while only filtered water reaches the cistern or back into the production process.
Rainwater filter for the downpipe
Product information
Garden rainwater collector GRS
The GRS garden rainwater collector is particularly suitable for filling the rain barrel in the garden. It is installed in the vertical downpipe. The housing and the filter insert are made of high-quality stainless steel. It filters the rainwater flowing in from above before diverting it to the side of the cistern. Leaves, moss and other debris are reliably separated and flushed away downwards. The GRS garden rainwater collector is also available without a filter insert.
Important details
Product information
Filter collector FS
The FS filter collector filters the rainwater directly in the downpipe while it is still being drained off to the side 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 them away.
Important details
Product information
Standpipe filter collector STFS
The standpipe filter collector is both a standpipe and a filter collector. It filters rainwater flowing in from above before it is drained off to the side 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 them downwards into the receiving water.
Important details
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 cistern. 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.
Important details
Product information
Rain collector RS
The RS rainwater collector is installed in the vertical downpipe. It filters the rainwater flowing in from above before discharging it laterally to the cistern. Leaves, moss and other debris are separated by the rainwater collector and washed away downwards.
Important details
Low maintenance Stainless steel filter insert with 0.28 mm or 0.44 mesh size UV-resistant plastic housing in white, grey or brown For detached houses up to 150 m² roof area
Cistern filter
Product information
Cistern filter LineAr 100
The Linear 100 cistern filter is ideal as a rainwater filter for cisterns - whether in new buildings or for retrofitting. It is easy to install thanks to its well thought-out design and does not require any additional earthworks.
There are only five centimetres between the inlet of the rainwater and the outlet for the dirt load. Due to this small height offset, the LineAr Filter 100 can be easily integrated into an existing pipe run. It can best be placed directly in the cistern without affecting the slope of the pipe.
Important details
Vortex fine filter
Product information
Vortex Fine Filter WFF 100
The WFF 100 vortex fine filter is usually installed in the horizontal rainwater pipe in the ground in front of the cistern. However, it is also suitable for free-standing installation, in which case it is best fixed with the optionally available wall fastening.
Rainwater flowing in from the side is filtered by the WFF 100 vortex fine filter and passed on to the cistern. In the process, it passes through the filter insert made of fine stainless steel mesh with a mesh size of only 0.28 mm. In this way, not only leaves and moss, but also smaller particles washed along with the water are reliably separated and flushed away.
Important details
Product information
Vortex Fine Filter WFF 150
The WFF 150 vortex fine filter is usually installed underground in the horizontal water pipe. It filters the rainwater flowing in from the side and directs it laterally to 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 also flushes them laterally into the sewage pipe system. A coarser mesh size of 0.44 mm is also available as an option, as well as free-standing installation with the wall mountings available as accessories.
Important details
Product information
Vortex Fine Filter WFF 300
The WFF 300 is a rainwater filter suitable for installation in the ground or for outdoor installation (e.g. for industrial use). Its trafficability has been tested according to ATV and, depending on the cover design, it can be driven over by vehicles with a total weight of up to 60 tonnes.
The housing is made of polypropylene and the filter insert is made of stainless steel. The mesh size of the filter fabric is 0.38 mm. We recommend two annual inspections, cleaning only when necessary.
Important details
Product information
Vortex Fine Filter WFF 300 VA
The WISY rainwater and industrial vortex fine filter WFF 300 VA is made entirely of stainless steel. Due to the unique arrangement of the filter fabric, it has a high self-cleaning effect and can therefore be operated almost continuously without having to interrupt the process cyclically.
It is designed for pressureless flowing media and can be used wherever filtering or concentration of solids in liquids is required.
The housing is made of polypropylene and the filter insert is made of stainless steel. The mesh size of the filter fabric is 0.38 mm. An annual cleaning interval of 2-3 basic cleanings per year is recommended by us.
Important details