The GRS stainless steel garden rainwater collector is equipped with a filter insert and is available for round downpipes with different diameters. The filter insert has a height of 10.5 cm and a mesh size of 0.44 mm. The outlet spout has a diameter of DN 50 .

The rainwater collector has automatic overflow protection and is winterproof because it is made of stainless steel. It is specially designed for use with a rain barrel in the garden and is installed in the downpipe . The outlet spout is to the rain barrel and also has a diameter of DN 50.

The rainwater collector complies with the drainage standards DIN EN 12056 and fulfils the requirements of DIN 1989. It can be supplied optionally with or without a filter insert, whereby the filter insert is extremely low-maintenance and is easy to clean . Cleaning is recommended at an interval of 2 to 3 times a year .

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Article number

For metal downpipes Da = outer Ø downpipe without filter insert with filter insert 0.44 mm
GRS 100 VA (DN) 100, Da 102 mm 15701 15711
GRS 87 VA (DN) 87, Da 89 mm 15702 15712
GRS 80 VA (DN) 80, Da 80 mm 15703 15713
GRS 76 VA (DN) 76, Da 76 mm 15704 15714
For plastic downpipes
GRS 110 VA (DN) 100, Da 110 mm 15705 15715
GRS 76 VA (DN) 70, Da 75 mm 15704 15714

Function and field of application

The garden rainwater collector is installed in the vertical downpipe. It filters rainwater flowing in from above before it is drained off to the side of the cistern. Due to its design, it is particularly low-maintenance: leaves, dirt and other washed-up debris fall through it and are flushed down into the drain. The filter result is optimally adapted to the needs of garden irrigation. The garden rainwater collector is also available without a filter insert.

Filter capacity

The flow through the garden rainwater collector can be up to 4.2 l/s, corresponding to the capacity of the downpipe. As in all WISY filters, the open cross-section of the roof drainage is maintained throughout. There are no constrictions of the cross-section where rainwater can accumulate. Not even in the case of cloudburst-like rainfall with heavy load input. Drainage safety according to DIN EN 12056 / EN 752 is always guaranteed, DIN 1989 is fulfilled. At the same time, the filter has a high hydraulic efficiency. At an inflow of 1.5 l/s, for example, 90 % of the incoming water is recovered as filtrate.

Automatic overflow

Mounted at the right height, the garden rainwater collector forms an automatic overflow for the rain barrel. As soon as the water reservoir is full, it directs further water to the drain or to infiltration. Overflowing is impossible.

Resistant housing

The housing of the garden rainwater collector is made of stainless steel. It is inserted into any section of the downpipe. Of course, it is frost and corrosion resistant and can also be installed in downpipes made of zinc, copper or plastic without galvanic interaction. Different connection widths allow for simple and easy installation.

Low-maintenance and -friendly

All WISY filter inserts are designed to be particularly low-maintenance. Their smooth stainless steel surface makes it almost impossible for impurities to settle. Because it is positioned above ground level, the garden rainwater collector is easily accessible and protected against backwater in the sewer system. If necessary, the filter insert can be removed from the housing in a few easy steps and cleaned with a high-pressure cleaner or in the dishwasher.