Detached house with extension, the extension is clad with a PREFA aluminium façade, the flat roof is drained using the PREFA parapet outlet connector and PREFA downpipe in P.10 anthracite,

Downpipe

Aluminium downpipes in best PREFA quality with extensive accessories

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The aluminium downpipe from PREFA: Stable, durable and suitable for every PREFA drainage system

The PREFA downpipe is part of the extensive aluminium roof drainage system and is available in different dimensions and colours. Every detail is available including assembly accessories and is perfectly coordinated. The downpipe fits all PREFA gutter systems, regardless of whether you choose the half-round gutter, the box gutter or the on-roof gutter. The rainwater is reliably drained off via the downpipe, also known as the drainage pipe.

The aluminium downpipe from PREFA: Stable, durable and suitable for every PREFA drainage system

PREFA gutter with downpipe in anthracite, along with a PREFA Siding.X facade

Roof drainage systems - suitable for every house and every roof

Whether a new build or renovation, whether carport, garden shed, detached house or apartment building, residential complex or large industrial building. Whether steep, flat or low-pitched roof, tiled roof, bitumen shingle roof, fibre cement panels, slate roof or other roof tiles. As part of the all-in-one system, the PREFA drainage system not only suits aluminium roofs, but can also be combined with practically all common roof materials*.

*Except copper roof

With a flat roof, for example, rainwater is safely drained off via the modern PREFA parapet outlet connector or a PREFA leader head in square or round design.

PREFA downpipe with PREFA parapet outlet connector in P.10 anthracite on a PREFA Siding.X facade, in P.10 anthracite as well

PREFA downpipe with PREFA parapet outlet connector in P.10 anthracite

The benefits at a glance

Rust-proof and without heavy iron metals

The PREFA downpipe is made of aluminium, so it does not rust. In addition, the rainwater can be used without restriction, since no heavy metals enter the waste water through washout.

Recyclable

Aluminium can be recycled as often as desired without any loss of quality.

Lightweight

Thanks to the lightweight aluminium construction material, easy installation and cost-saving transport are possible.

Highly weather-resistant and long-lasting

The gutters and downpipes are produced from colour-coated aluminium coils. Thanks to the high-quality surface treatment in a coil-coating process, the paint layer remains malleable and highly resistant, even under extreme weather conditions.

Rust-proof and without heavy iron metals

The PREFA downpipe is made of aluminium, so it does not rust. In addition, the rainwater can be used without restriction, since no heavy metals enter the waste water through washout.

Recyclable

Aluminium can be recycled as often as desired without any loss of quality.

Lightweight

Thanks to the lightweight aluminium construction material, easy installation and cost-saving transport are possible.

Highly weather-resistant and long-lasting

The gutters and downpipes are produced from colour-coated aluminium coils. Thanks to the high-quality surface treatment in a coil-coating process, the paint layer remains malleable and highly resistant, even under extreme weather conditions.

Harmonious design or strong colour accents : The all-in-one roof drainage system offers many options.

Whether tone-in-tone or deliberately contrasting, the PREFA drainage system - consisting of gutters, pipes and accessory products - offers a great deal of design scope in combination with the roof and façade. Choose from our wide range standard colours.

Thanks to the tried and tested "P.10" surface finish, the coating remains functional and attractive even after many years. PREFA gutters as well as the downpipe are available in the following colours - of course with a 40-year material guarantee.

Colour overview (13)

Colour

Code

~ RAL

01 Braun

P.10 brown

7013

02 Anthrazit

P.10 anthracite

7016

03 Schwarz

P.10 black

9005

07 Hellgrau

P.10 light grey

7005

10 Prefaweiß

P.10 prefa white

9002

11 Nussbraun

P.10 nut brown

8019

PREFA dunkelgrau ähnlich DB 703 oder RAL 7043

P.10 dark grey

7043

04 Ziegelrot

brick red

8004

05 Oxydrot

oxide red

3009

06 Moosgrün

moss green

6005

08 Zinkgrau

zinc grey

7030

12 Silbermetallic

metallic silver

9006

13 naturblank

plain aluminium

Notes

  • The RAL values stated are merely approximate values (~), some of which may differ vastly from the original PREFA colour and, under certain circumstances, may not reflect the subjective perception of the colour. 
  • Above all for colour quality P.10, it is almost impossible to define values due to the surface structure.
  • Plain aluminium: The guarantee does not cover surface appearance alterations caused by processing and environmental influences. Follow the instructions.
  • Metallic colours may vary in shade.
  • To identify exact colours for complementary components please consult original samples.

Tip from the experts: Sensible use of rainwater: Saving money and resources in the garden too.

The valuable rainwater does not have to seep away unused or be fed directly into the sewage system, it can also be used as lime-free watering water for the garden. The PREFA water collector or downpipe cleanout is used for this purpose: These divert the rainwater into the rain barrel.

Water collector: Commercially available garden hoses that divert the rainwater into a rain barrel, cistern, etc. can be connected toit. If the collection container is full, the water runs off in the downpipe and overflowing of the collection container is thus prevented. In winter, the connection can be closed with the cover included to winter-proof the rain barrel and thus prevent the collection container from freezing.

Water collector in brown by PREFA

Downpipe cleanout: It can be opened or closed manually, depending on whether you want to drain rainwater into the rain barrel or not. The downpipe cleanout is also equipped with a removable leaf screen. Coarse debris can thus be intercepted and easily removed to prevent clogging and possible freezing of the pipes.

PREFA downpipe cleanout in brown, to fold out when rainwater is to be drained off, e.g. for the rain barrel

Please note: Rainwater flowing over certain roof and drainage materials (e.g. copper or zinc) should only be used to a limited extent. If you have large copper or zinc surfaces, you should check the rainwater to see if it is contaminated with heavy metals. Tar paper roofs with bitumen coatings could also be potentially harmful to plants, garden ponds, or the environment. It is best to obtain information from the manufacturer!

Extra strong: Downpipe in 1.6 mm material thickness: Extra weather-resistant and yet still elegant

With a length of almost three metres and made of 1.6 mm thick aluminium, this downpipe offers two decisive product advantages: Thanks to its particularly high resistance, it is ideal for installing in entrance or garden areas as it cannot get dented, for example by playing children, or by objects toppling over. Its length also presents visual advantage as no fasteners are required at eye level or in the direct field of vision. This functional detail creates an elegant impression, especially on modern detached houses as it allows the roof drainage system to fade discreetly into the background when tone-in-tone solutions are used to match the colour of the façade. Ask your PREFA installation company about the robust downpipe!

Whenever it’s to be particularly resistant

The downpipe with the greater thickness of 1.6 mm is also recommended for public areas. The more solid pipe is used in the lower section and the drain pipe in the standard version is used further up. Thanks to the same outer diameter, no visual difference can be observed.

Square downpipe: the square alternative to the downpipe: Reduced and elegant design

In addition to the round version, the downpipe, PREFA also offers a square version to safely remove rainwater from the roof surface: the PREFA square downpipe. With 10 × 10 cms and 8 × 8 cms, two dimensions of the robust, angular downpipe are available.

Square downpipe: the square alternative to the downpipe: Reduced and elegant design

Modernes Einfamilienhaus mit Flachdach und schmalen Fenstern. Die Fassade ist mit der PREFA Siding.X Fassade im faltigen Look in der Farbe Bronze verkleidet. Die Anschlüsse wurden in Anthrazit gemacht. Zur Dachentwässerung dient das PREFA Quadratrohr mit dem dazu passenden Wasserfangkasten in Anthrazit.

Easy to clean and maintain: And the rainwater can drain away unhindered.

Storms with heavy rain and winds are becoming more and more frequent as has become increasingly apparent in recent years. The drainage system then not only has to cope with large amounts of water, but also with leaves and branches that are blown onto the roof and into the gutters.

Particularly after extreme weather events or also in autumn, it should be checked whether dirt is blocking the drainage of the rainwater gutters. PREFA offers the strainer (diameter 80–120) for the gutter outlet or the leaf screen for the downpipe cleanout. This integrated, removable sieve makes it easy to remove impurities. Otherwise, the water accumulated due to impurities is in danger of freezing and damaging the pipe. In any case, the rain barrel and rainwater collector should be emptied in autumn to prevent frost damage.

Gutter with a lot of autumn leaves, clean clogged gutters

The correct dimension and installation: In this way, your new downpipes will stand up to any weather.

Suitable accessories for professional installation of the pipe clamps are available for the different types of façade – both for the rear-ventilated (PREFA) façade as well as for a composite thermal insulation system. The installation is done with pipe clamp dowels, mandrels and brackets or by means of wall mounting plates for timber façades, composite panels or the sidings. The pipe clamp can be used independently of the fastening. In this way, the fastening can be selected depending on the substrate. PREFA downpipes (∅ 80, ∅ 100, ∅ 120, ∅ 150) are supplied with protective film, which protects them from damage during transport and also during installation. (After installation, however, the protective film should be removed quickly so that it does not become brittle due to UV radiation and thus more difficult to remove).

Calculate the optimal pipe diameter

The correct dimensioning of the required rain gutter diameter as well as the diameter of the drain pipes is crucial. After all, large volumes of rainwater must not be allowed to back up or overflow. The correct calculation is no problem for PREFA installer partners; moreover, craftsmen can find helpful tools on the website and in the log-in area to ensure optimum dimensioning.

Technical specifications on the PREFA downpipe

Material

Coated aluminium, 0.7/1.6 mm thick, coil coating and powder coating

Dimensions 0.7 mm

∅ 60 × 3.000 mm
∅ 80 × 3.000 mm
∅ 100 × 3.000 mm
∅ 120 × 3.000 mm
∅ 150 × 3.000 mm*

* not available in P.10

Dimensions 1.6 mm

Extruded profile

∅ 100 × 3.000 mm

Planning & Application

Our installers and architects can download specification documents for the PREFA roof drainage system here.

Accessories

PREFA Downpipe

PREFA Downpipe

Ø 60 mm

PREFA Downpipe 1,6 mm

PREFA Downpipe 1,6 mm

100 Ø /1.450

PREFA downpipe connector

⌀ 60, 80, 100, 120

PREFA sliding collar

Ø 80, 100

PREFA pipe bracket – with M10 thread without pin

⌀ 80, 100, 120, 150

PREFA downpipe elbow 40°

⌀ 60, 80, 100, 120

wall mounting plate

with M10 thread

PREFA downpipe elbow 72°

⌀ 80, 100, 120, 150

PREFA downpipe elbow 85°

⌀ 60, 80, 100, 120

PREFA swan neck

⌀ 80, 100, 120, 150

Water collector in brown by PREFA

PREFA water collector

⌀ 80, 100, 120

PREFA downpipe cleanout in brown, to fold out when rainwater is to be drained off, e.g. for the rain barrel

PREFA downpipe cleanout

⌀ 80, 100, 120

PREFA downpipe branch

80 × ⌀ 60, 80 × ⌀ 80, 100 × ⌀ 60, 100 × ⌀ 80, 120 × ⌀ 80, 100 × ⌀ 100, 120 × ⌀ 100, 120 × ⌀ 120

PREFA tapered downpipe branch

100 × Ø 50-75 mm

PREFA standpipe cap

60/115, 80/115, 100/115, 100/150, 120/150

PREFA straight downpipes with access pipe

⌀ 80, 100, 120

PREFA pipe bracket for straight downpipes

⌀ 80, 100, 120

PREFA thermal insulation system pipe clamp dowel D 10

suitable for pipe clamp mandrels for thermal insulation system pipe clamp dowel D 10

PREFA ROHRSCHELLENDORN

aus Stahl, feuerverzinkt lt. Ö-Norm B3521-1, inkl. Abdeckkappe aus Kunststoff

PREFA ROHRSCHELLENDORN Ø 10 mm

aus Stahl, feuerverzinkt lt. Ö-Norm B3521-1, inkl. Abdeckkappe aus Kunststoff suitable for thermal insulation system pipe clamp dowel Ø 10 mm

PREFA Dachrinnen Laubfänger, fängt grobe Verschmutzungen auf, damit das Ablaufrohr nicht verstopft wird

PREFA strainer

⌀ 80, 100, 120

PREFA Wasserfangkasten

PREFA leader head

⌀ 80, 100, 120, 150

PREFA Speiereinmündung rund

PREFA parapet outlet downpipe connector

⌀ 100

PREFA Wasserfangkasten rund

PREFA water collection box, round

Ø 100

PREFA rain chain

5 mm

PREFA expansion component

6000 × 375 mm