Description
Stabilised Hopper Head – Concave Form W-K, Copper and Titanium-Zinc
Protec manufactures a stabilised hopper head (concave form, W-K type) – the traditional-style drainage component connecting the gutter to the downpipe. The characteristic concave curved profile, known in the European roofing trade as the eingeschwungen form, provides structural stability while creating a visually distinctive silhouette primarily associated with traditional and heritage European architecture. Available in a full range of materials including copper, titanium-zinc, zinc alloys, hot-dip galvanized steel, and powder coating in any RAL colour on custom order. Emergency overflow available on request. As a direct European manufacturer, Protec produces all hopper heads to order with OEM capability.
The Stabilised Form – Traditional European Architecture:
The stabilised (concave) hopper head is one of the most established forms in European roof drainage metalwork. The inward curve in the middle section of the body is a characteristic detail of Central European traditional architecture – townhouses, rural farmhouses, manor houses, and civic buildings from the 18th century onwards. Grömo confirms the stabilised hopper is *”primarily used in traditional architecture due to its stabilised form.”* Protec manufactures this form as a direct producer with a broader material range than any competitor currently available in the European market.
Technical Specification:
- Type: Stabilised hopper head – concave form (W-K / eingeschwungen)
- Gutter connection: RG 200 to RG 400 (DIN EN 612)
- Downspout outlet: DN 76 / DN 80 / DN 87 / DN 100 / DN 120 mm
- Available materials: Copper, titanium-zinc natural, Zinc Slate, Zinc Quartz, Zinc Graphite, Anthra Zinc, hot-dip galvanized steel
- Surface finish: Natural metal or powder coating in any RAL colour (on request)
- Emergency overflow: Available on request
- Production: Made to order – custom dimensions available
Available Materials and Finishes – Full Range:
- Copper – premium longevity with natural green patina – the traditional choice for heritage and listed buildings
- Titanium-zinc natural – self-regenerating patina, exceptional weather resistance – classic European architectural metalwork material
- Zinc Slate – dark muted grey for contemporary traditional facades
- Zinc Quartz – warm light grey for stone and render facades
- Zinc Graphite – deep dark grey for minimalist styles
- Anthra Zinc (anthracite) – intense dark colour for contemporary prestige buildings
- Hot-dip galvanized steel – durable and cost-effective standard finish
- Powder coating in any RAL colour – on custom order for precise colour matching
Applications:
- Traditional townhouses and farmhouses – the stabilised concave form is the historically correct hopper head detail for vernacular and rural European architecture
- Manor houses and country estates – copper or titanium-zinc stabilised hopper heads for prestige rural properties
- Heritage restoration projects – matching original concave hopper head profiles in period-appropriate materials
- Listed buildings and conservation areas – sympathetic drainage detailing in copper or zinc for protected settings
- New traditional-style builds – where period-authentic drainage components are specified by architects or planners
Manufacturer – OEM and Custom Order:
The stabilised hopper head W-K is produced to order by Protec – a direct European manufacturer of traditional drainage components. Custom dimensions, outlet sizes, materials, emergency overflow, and RAL powder coating available on individual order. OEM production and private label supply for distributors and roofing contractors. View our full hopper head range or contact us for a tailored quote.
