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£96.00
The Harmer C400/F Cast Iron Vertical Outlet is available as clearance stock, offered at a significantly reduced price while supplies last. These are brand-new, high-quality components sold at discount due to end-of-line status. Once sold out, they will not be restocked.
Engineered from high-strength cast iron and certified to BS EN standards, this 110 mm outlet provides exceptional durability, high load-bearing capacity, and reliable drainage performance for both roof and ground-level applications. Its flat, sherardised grate delivers long-lasting protection in even the most demanding environments.
The Harmer C400/F is a robust cast iron roof outlet designed for effective rainwater drainage across flat and low-slope roofing systems. Supplied with a sherardised (zinc-coated) clamping ring and flat grate, the outlet ensures strong structural performance, enhanced corrosion resistance, and a secure interface with roofing membranes.
Unlike standard roof outlets, the C400/F is engineered for heavy-duty ground use, offering a designated load rating of up to 12.5 tonnes. Its inherent cast iron strength and sherardised finish make it suitable for exposed external locations, including areas accessed by vehicles or subject to high levels of foot or equipment traffic.
Ground-Level Use (Heavy-Duty Application)
The Harmer C400/F is suitable for high-demand ground installations, thanks to its certified load rating and structural design.
Suitable For:
Driveways
Car parks
Loading bays
External walkways
Commercial courtyards
Industrial yards
Areas exposed to high traffic or heavy vehicles
Why It Works at Ground Level
Cast iron’s crystallised structure resists impact and distortion.
Sherardised components provide superior corrosion protection.
Rated up to 12.5 tonnes, meeting the needs of load-bearing applications.
This places the C400/F well beyond typical “roof-only” outlets, offering true multi-environment capability.
Product Type: Cast iron outlet with flat grate
Outlet Size: 110 mm (4″)
Material: Cast iron (BS EN 1561)
Coating: Sherardised zinc finish for extra durability
Load Rating: Up to 12.5 tonnes
Drainage Standard: BS EN 12056-3 compliant
Grate Type: Heavy-duty flat cast iron grate
Flow Capacity: Approx. 6.3 L/s
Supplied Components: Outlet body, clamping ring, flat grate
Suitable Roof Types: Felt, asphalt, liquid, single-ply systems
Installation: Vertical connection to 110 mm pipework
Service Life: Extremely long-lasting
Fully compatible with most flat roofing systems.
Suitable for both roof and ground-level installations.
Approved for use in areas accessed by heavy vehicles.
Sherardised metal components resist corrosion from environmental exposure.
Flat roof drainage
Terraces and podium decks
Commercial courtyards
Industrial and loading areas
Car parks and driveways
Heavy-duty external drainage points
Replacement of aging cast iron drainage components
Cost-effective solutions using clearance stock
Harmer Building Drainage offers a complete portfolio for managing water across roofs, interiors and outdoor spaces. Its cast iron, aluminium and stainless-steel outlets, channels and soil systems provide dependable performance and installation efficiency for all project types.
