These 75mm round cast iron downpipes sit right in the middle of the range, and for a lot of traditional domestic rainwater systems that makes them a very sensible choice.
They’re bigger than the 65mm pipe, but still neat enough that they don’t look oversized on a normal house elevation.
Also known as 3-inch cast iron downpipes, they’re commonly used with cast iron guttering on period homes, renovations, extensions and other properties where you want to keep the rainwater system properly in keeping with the building.
We stock the matching bits too, so you can build the full run rather than just buying the straight pipe and then hunting around for the rest. That includes bends, offsets, brackets, shoes and other fittings, depending on how the pipe needs to get from the gutter outlet down to ground level.
If your roof feeds into a hopper first, take a look at our cast iron hoppers. And if you’re still working out which gutter profile and size you need above it, our main cast iron guttering page is the best place to start.
One thing worth checking before you order: if you’re replacing an old pipe, actually measure it. Older cast iron systems are not always quite as straightforward as they look, and a pipe that appears to be 75mm from the ground may turn out to be another size once measured properly.
If you’re comparing options, our Cast Iron Guttering Sizes Explained guide should help.
Alumasc Apex 75mm (3") x 1.83m Cast Iron Downpipe with Ears - Black
Alumasc Apex 75mm (3") x 1.83m Cast Iron Downpipe without Ears - Black
Alumasc Apex 75mm (3") x 0.9m Cast Iron Downpipe with Ears - Black
Alumasc Apex 75mm (3") Zinc Plated Steel Downpipe Bracket for Cast Iron - Black
Alumasc Apex 75mm (3") Drive-In Pipe Support Bracket for Cast Iron - Pre-painted Black
Alumasc Apex 75mm (3") Cast Iron 90 degree Bend without Ears - Black
Alumasc Apex 75mm (3") Cast Iron 112 degree Bend without Ears - Black
Alumasc Apex 75mm (3") Cast Iron 135 degree Bend without Ears - Black
Alumasc Apex 75mm (3") Cast Iron 112 degree Branch without Ears - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 75mm (3") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 115mm (4.5") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 150mm (6") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 225mm (9") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 305mm (12") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 380mm (15") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 455mm (18") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 535mm (21") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 610mm (24") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 685mm (27") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 765mm (30") Projection - Black
Alumasc Apex 75mm (3") Cast Iron Loose Socket with Ears - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Eared Shoe - Black
Alumasc Apex Left-hand 75mm (3") Cast Iron Downpipe Rainwater Divertor - Black
Alumasc Apex 75mm (3") Cast Iron Loose Socket without Ears - Black
Alumasc Apex 75mm (3") Cast Iron Access Pipe 400mm long with Ears - Black
Alumasc Apex 75mm (3") Cast Iron Downpipe Shoe without Ears - Black
Alumasc Apex Right-hand 75mm (3") Cast Iron Downpipe Rainwater Divertor - Prepainted Black
Alumasc Apex 75mm (3") x 1.83m Cast Iron Downpipe with Ears - Primed
Alumasc Apex 75mm (3") x 1.83m Cast Iron Downpipe without Ears - Primed
Alumasc Apex 75mm (3") x 0.9m Cast Iron Downpipe with Ears - Primed
Alumasc Apex 75mm (3") Zinc Plated Steel Downpipe Bracket for Cast Iron - Primed
Alumasc Apex 75mm (3") Zinc Plated Drive-In Pipe Support Bracket for Cast Iron - Primed
Alumasc Apex 75mm (3") Cast Iron 90 degree Bend without Ears - Primed
Alumasc Apex 75mm (3") Cast Iron 112 degree Branch without Ears - Primed
Alumasc Apex 75mm (3") Cast Iron 135 degree Bend without Ears - Primed
Alumasc Apex 75mm (3") Cast Iron 112 degree Bend without Ears - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 75mm (3") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 115mm (4.5") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 150mm (6") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 225mm (9") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 305mm (12") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 380mm (15") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 455mm (18") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 535mm (21") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 610mm (24") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 685mm (27") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Offset 765mm (30") Projection - Primed
Alumasc Apex 75mm (3") Cast Iron Loose Socket with Ears - Primed
Alumasc Apex 75mm (3") Cast Iron Downpipe Eared Shoe - Primed
Alumasc Apex Left-hand 75mm (3") Cast Iron Downpipe Rainwater Divertor - Primed
Popular black painted and primed cast iron products are usually available for next working day delivery when ordered before 11:30am, subject to stock. Custom RAL colours normally take around 7–10 working days.
For many UK homes, 115mm or 125mm guttering is a common choice. Smaller roof areas such as porches and outbuildings may use 100mm, while larger roofs or longer runs may need 150mm. Roof area, gutter profile and the number of outlets all matter, so it is worth checking before ordering.
Yes. We supply matching cast iron downpipes, hopper heads, brackets, outlets and fittings across the range, so you can put together a complete rainwater system rather than mixing different manufacturers or profiles.
Yes. Alongside painted black and primed finishes, many cast iron gutters, downpipes and hoppers can be supplied in custom RAL colours. Bespoke finishes are usually supplied within 7–10 working days.
Standard products can usually be returned within 30 days of delivery, although returns after the first 14 days may be subject to a restocking or handling charge. Made-to-order and custom-colour items are non-refundable, so it is worth checking sizes and finishes carefully before ordering.
Painted black products arrive with the finished colour already applied and are ready to install. Primed products are intended for projects where you want to apply the final decorative finish on site.
Normally, no. Plain Half Round, Beaded Half Round, Victorian Ogee, Moulded Ogee and Deepflow all use different shapes and fittings. It is best to keep the gutter lengths, unions, angles and outlets within the same profile and size.
Send us a photo and a few measurements. The overall width, depth, profile shape and downpipe diameter are usually enough to narrow it down and help identify the closest matching system.
You can buy individual components. We stock gutter lengths, unions, angles, stop ends, outlets, brackets, downpipes, bends, shoes, hopper heads and sundries separately, which is useful for repairs as well as complete installations.
Yes. If you have plans, elevations or even a marked-up sketch, send them over and we can help work through the likely gutter lengths, outlets, downpipes, angles and fittings required.
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