Our 100 x 75mm Cast Iron Deepflow guttering is the smaller of the two Hargreaves Deepflow sizes we stock, and it’s a really useful option where standard Half Round guttering may not quite have enough capacity.
The profile measures approximately 100mm wide x 75mm deep (4" x 3"), so you get the benefit of a deeper gutter without it looking oversized on a typical roofline.
It’s a good fit for larger houses, period properties, extensions and smaller commercial buildings where rainwater handling matters but the 125mm system would simply be more gutter than you need.
At Cast Iron Warehouse, we supply the full Hargreaves Foundry 100 x 75mm system, including gutter lengths, angles, outlets, stop ends, brackets and the other fittings needed to put a complete run together. From there, you can connect into our matching cast iron downpipes and cast iron hoppers where the roof layout calls for them.
Choose from primed or factory painted black with custom RAL colours available on request for projects where the guttering needs to match existing metalwork or a specific architectural finish.
Typical delivery on Hargreaves Deepflow is 3–5 working days from point of order.
Need more capacity? Compare it with our 125 x 75mm Deepflow option, or browse the full Cast Iron Deepflow Half Round Guttering range.
Hargreaves Foundry x 75mm (4"x3") Painted Cast Iron Deep Half-Round Gutter - 1.83m (6ft)- Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron Deep Half-Round Fascia Bracket - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Deep Half-Round Galvanised Side Fix Bracket - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Deep Half-Round Galvanised Top Fix Bracket - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron Deep Half-Round Union Clip - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron Internal Deep Half-Round Stopend - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron External Deep Half-Round Stopend - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron Deep Half-Round 65mm Running Outlet - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron Deep Half-Round 75mm Running Outlet - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron RH Deep Half-Round 135 Degree Angle - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron LH Deep Half-Round 135 Degree Angle - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron RH Deep Half-Round 90 Degree Angle - Black
Hargreaves Foundry 100 x 75mm (4"x3") Painted Cast Iron LH Deep Half-Round 90 Degree Angle - Black
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron Deep HR Gutter - 1.83m (6ft) - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron Deep HR Fascia Bracket - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Deep HR Galvanised Rise & Fall Bracket - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Deep HR Galvanised Side Fix Bracket - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Deep HR Galvanised Top Fix Bracket - Primed
Hargreaves Foundry100 x 75mm (4"x3") Primed Cast Iron Deep HR Union Clip - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron Internal Deep HR Stopend - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron External Deep HR Stopend - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron Deep HR 65mm Running Outlet - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron Deep HR 75mm Running Outlet - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron RH Deep HR 135 Deg Angle - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron LH Deep HR 135 Deg Angle - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron RH Deep HR 90 Deg Angle - Primed
Hargreaves Foundry 100 x 75mm (4"x3") Primed Cast Iron LH Deep HR 90 Deg Angle - 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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