Rainwater downpipes

Nedzink produces a wide range of zinc rainwater downpipes suitable for various types of buildings such as new construction and renovation. Our downpipes are also suitable for the replacement of existing downpipes and the repair of downpipes.

Zinc rainwater downpipes are made from NedZink NTZ® and must meet EN 612. Standard prefab lengths are 2 and 3 meters. Non-standard downpipes can be supplied. Non-standard prefab downpipes must also meet EN 612. Rainwater downpipes can be supplied as a rounded, square, or rectangular model. The longitudinal seam is welded and one of the ends is expanded. Table 3.2 below contains the standard rainwater downpipes.

Rainwater downpipes can be supplied as a rounded, square, or rectangular model. The longitudinal seam is welded and one of the ends is expanded. Table 3.1 below contains the standard rainwater downpipes.

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How to install a rainwater downpipe?

To install downpipes is to hang them from the top to the bottom. In principle, the downpipes are not soldered, they are slipped in to one another with a minimum overlap of 50 mm. The upper short length of piping must not be able to press against the bottom side of the gutter and must therefore have at least 20 mm space. The outlet piece must be slipped into the drain pipe by at least 50 mm, so that the projecting outlet piece must be 70 mm in length.

Each length of piping must be bracketed at least once. The brackets must be fastened at a maximum of 2 meters distance, and the upper bracket must be installed at least 1 meter under the gutter bottom. The distance between the back of the pipe and the  façade must be at least 30 mm. The distance between the brackets is 2 meters. To enable lateral movement of the gutter, the first hinge bracket must be placed 1 meter from the bottom of the gutter. The distance between the bottom of the gutter and the top of the drain pipe must be at least 20 mm to allow for expansion of the pipe.

What are the possibilities with rainwater downpipes?

Zinc downpipe bend

With a zinc downpipe bend you can easily deflect and / or extend the down pipe. Both square and round bends are available.


The double bead is available in round and square sizes and is slid around a rainwater drainage pipe. Due to the use of a double bead, the zinc downpipe cannot sink and gives a traditional look without soldering.

Zinc downpipe connector

A connector is used to connect a shortened downspout to a subsequent downspout. Because there is a widening at the top of the connection sleeve, a zinc downspout can be easily and quickly slipped around the shortened downspout.

Zinc downpipe brackets

By means of a downpipe bracket you attach the zinc downpipe to different types of walls. Various types of downpipe brackets are available for attaching the downpipe to, for example, wooden walls, stone walls and / or steel sheet piling. To obtain the original look with the drainpipe, use a double bead.


Overflow is used for the transition of the rainwater drainage from the flat roof to the down pipe.

Rain diverter

The rain diverter is placed between downpipes. When open, it can fill a rain barrel, for example. When closed, the water simply flows through. Thanks to the integrated stainless steel grille, the rainwater valve also serves as a leaf catcher.

Zinc leaf guard

A zinc leaf guard prevents blockages in the rainwater drain. The leaf separator ensures that leaves and other dirt are led out through the grid. The leaf guard is installed in the rainwater drain itself.

Standard rainwater downpipes

NedZink rainwater downpipes are available in NedZink NATURAL en NedZink NOVA.

Diameter Mass Thickness length
Round 80 mm 1,161 kg/m 0,65 mm 2 & 3 m
Round 100 mm 1,451 kg/m 0,65 mm 2 & 3 m
Square 80 mm 1,485 kg/m 0,65 mm 2 & 3 m
Square 100 mm 1,860 kg/m 0,65 mm 2 & 3 m

Table 3.1

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