Cast Iron Standrohre and Downpipe Bases in Germany: Terminology for Historic Buildings

For British architects, contractors and owners working on historic buildings in Germany, and for local specifiers who read English. What the cast iron base section is, how local rainwater terms translate, and how to order an exact copy from the UK.

Deutsch: Guss-Standrohre für Regenfallrohre: Leitfaden für Baudenkmäler

Technical summary

On historic German buildings, gutters (Dachrinnen) and downpipes (Fallrohre) are traditionally zinc, sometimes copper. Cast iron is used mainly for the Regenstandrohr: the bottom section, standing roughly 0.5 m to over 1 m above ground, that takes knocks and connects the downpipe to the underground drain (Grundleitung). Historic Standrohre, straight or bent, round or square, plain or fluted, are often damaged or replaced. We copy cast them to order with a socket sized to the existing downpipe. Works to a listed building (Baudenkmal) usually need a denkmalrechtliche Genehmigung from the Untere Denkmalschutzbehörde.

The cast iron base section in Germany

In Germany, the Regenstandrohr is the tough bottom section that connects the downpipe to the underground drain, traditionally made of cast iron among other robust materials.

German building references describe the Regenstandrohr as the link between the Fallrohr and the Grundleitung, standing from about 0.5 m to over 1 m above ground and made in tougher material to resist impact. Antique fluted cast iron Standrohre are still found on town houses, churches and public buildings, and turn up at architectural salvage dealers.

Britain has no exact equivalent: a British cast iron downpipe usually runs full height and ends in a shoe or drain connector.

German and British rainwater terms

Most German rainwater terms have a direct British equivalent; the cast iron base section is the one without an exact match. Use both sets of terms on a schedule for a project in Germany.

Copy casting a downpipe base

We reproduce cast iron base sections by casting from a surviving example, measured photographs or drawings. The more complete the reference, the closer the copy.

1. Send a surviving section, or photographs from front and side with a tape measure in shot, plus measurements.
2. We prepare the pattern and ask you to approve it before casting.
3. Castings are poured, fettled and checked.
4. Finish in primer, factory black, linseed oil paint or our coastal specification.
5. We keep the pattern, so repeat orders are simpler and cheaper.

Lead time is typically 12–14 weeks from pattern approval; linseed oil paint adds 6–7 weeks. Our guide to copy casting explains the process.

Consent for protected buildings in Germany

Heritage protection in Germany is set by each federal state (Land); consent is usually granted by the local heritage authority (Untere Denkmalschutzbehörde).

• Consent — changes to a Baudenkmal usually need a denkmalrechtliche Genehmigung or Erlaubnis under the state heritage law; in some states, such as Berlin, this also covers repair works.
• Authority — applications go to the Untere Denkmalschutzbehörde of the city or district, with the state heritage office (Landesamt für Denkmalpflege) advising.
• In practice — an exact cast iron copy of the original Standrohr is usually the simplest case. Agree the work with the authority early.

What we need from you

• Number of sections and their positions on the façade
• Shape: straight or bent, round or square, plain, fluted or decorated
• Overall length
• Outside diameter of the upper pipe that sits in the cast iron section
• Size and type of the connection to the drain
• Wall fixing and wall material
• Front and side photographs with a tape measure in shot
• Finish and colour
• Protection status and any conditions set by the heritage authority
• Delivery address, site access and target date

Delivery to Germany

Orders to Germany are quoted individually and travel by pallet road freight, with courier for small items. Goods enter the EU through customs. Goods meeting the UK–EU rules of origin enter free of customs duty, but import VAT and clearance charges usually apply. UK VAT is zero-rated on exports with proof of export. See international supply and shipping for full details.

German downpipe bases — frequently asked questions

What is the cast iron base of a downpipe called in Germany?

In Germany it is usually called “Regenstandrohr” or “Standrohr”. It is the cast iron bottom section of a downpipe whose upper part is zinc, sometimes copper, fitted to resist impact and connect the downpipe to the drain.

Were gutters in Germany made of cast iron?

Rarely. Historic gutters and upper downpipes in Germany are usually zinc, sometimes copper. Cast iron appears mainly at the foot of the downpipe.

Can you copy an existing cast iron downpipe base from a building in Germany?

Yes. We copy cast base sections from a surviving example, measured photographs or drawings, matching length, profile, socket and any decoration. Allow typically 12–14 weeks from pattern approval, plus road freight.

Will a new cast iron base fit the existing downpipe?

Yes, if we have the outside diameter of the existing pipe and the size of the connection to the drain. The upper pipe sits in the socket of the cast iron section, which we make to the measured size.

Do I need permission to replace downpipe sections on a protected building in Germany?

Usually. Heritage law is set by each German state; changes to a Baudenkmal generally need a denkmalrechtliche Genehmigung from the Untere Denkmalschutzbehörde, and in some states repair works too. Agree the work with the authority before starting.

How are orders delivered to Germany?

By pallet road freight, with courier for small items. Goods enter the EU through customs; goods meeting the UK–EU rules of origin enter free of customs duty, but import VAT and clearance charges usually apply.

Conclusion

In Germany, cast iron belongs mainly at the foot of the downpipe, where it protects the zinc pipe and gives the façade its finished detail. A base section copied exactly, sized to the existing pipe and finished correctly, restores that detail. We copy cast downpipe bases to order and supply complete BS 460 cast iron systems for British-style buildings. Send photographs and measurements through our contact page or call +44 333 987 4452.