BTU stand’s for British Thermal Units. This was the old (Imperial) measurement for heat in connection with plumbing. Although BTU’s is a term still commonly used within the heating and plumbing, the industry is now going over to KW’s Kilowatts.
£75.53 – £133.18Price range: £75.53 through £133.18 +VAT
A genuine cast iron rainwater pattern the G46 or No.46 is available in two profile sizes. The profile is a larger version of the more traditional ogee (OG) curved pattern and offers increased capacity.
Cast iron G46 moulded drop end outlet and moulded stop end outlet. A genuine cast iron rainwater pattern the G46 or No.46 is available in two profile sizes. The profile is a larger version of the more traditional ogee (OG) curved pattern and offers increased capacity.
Cast iron gutters and pipes offer great strength and durability, a proven history of long life, low noise operation, and fire resistance. Most old buildings have cast iron rainwater systems that should be maintained and preserved however; these inherent benefits make a cast iron rainwater system an ideal choice for both traditional and modern installations.
G46 moulded drop-end outlet – external for 65mm downpipe: G4321A, G5421A, XG4321A, XG5421A
G46 moulded drop-end outlet – external for 75mm downpipe: G4321B, G5421B, XG4321B, XG5421B
G46 moulded drop-end outlet – internal for 65mm downpipe: G4322A, G5422A, XG4322A, XG5422A
G46 moulded drop-end outlet – internal for 75mm downpipe: G4322B, G5422B, XG4322B, XG5422B
| Size/Finish | Black 125mm x 100mm to 100mm x 75mm Rect Out, Black Painted 125mm x 100mm to 100mm Out, Black Painted 125mm x 100mm to 65mm Out, Black Painted 125mm x 100mm to 75mm Out, Primer 100mm x 75mm to 65mm Out, Primer 100mm x 75mm to 75mm Out, Primer 125mm x 100mm to 65mm Out, Primer 125mm x 100mm to 75mm Out, Primer 125mm x 100mm to 100mm x 75mm Rec Out, Primer 125mm x 100mm to 100mm Out, Black Painted 100 x 75mm to 65mm Out, Black Painted 100 x 75mm to 75mm Out |
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| Socket | Internal, External |
BTU stand’s for British Thermal Units. This was the old (Imperial) measurement for heat in connection with plumbing. Although BTU’s is a term still commonly used within the heating and plumbing, the industry is now going over to KW’s Kilowatts.
Most old buildings have cast iron rainwater systems that should be maintained and preserved however; these inherent benefits make cast iron an ideal choice for both traditional and modern installations. It is not uncommon to see modern alternative products marketed with terms like low maintenance or easy to install and cost effective. It has even been said that ‘plastic guttering systems provide a way of achieving a traditional look with modern convenience
As well as being easier to produce, the material enabled eaves gutters to be installed more simply, since lead could only be used in this location as a lining for timber gutters. Many modern materials focus on replicating the appearance of cast iron but those materials can vary rarely offer any of the benefits. Cast iron gutters and pipes offer great strength and durability, a proven history of long life, low noise operation and fire resistance.
Most old buildings have cast iron rainwater systems that should be maintained and preserved however; these inherent benefits make cast iron an ideal choice for both traditional and modern installations. It is not uncommon to see modern alternative products marketed with terms like low maintenance or easy to install and cost effective. It has even been said that ‘plastic guttering systems provide a way of achieving a traditional look with modern convenience’.
These terms tend to refer to possible cost savings rather than any real product benefits. It is also difficult to quantify the benefits of modern convenience over traditional build quality. It is worth remembering that all rainwater goods will require some element of maintaining to ensure they are unblocked by debris and remain functional. No rainwater system cleans itself.
Today most suppliers of cast iron rainwater systems offer products in both primer or pre-painted with a 10 year protective coating. When describing modern materials, the term ‘cost effective’ is used rather than simply saying cheap. There is no doubt that the initial cost of many modern materials is less than cast iron but you might be surprised to know that over its lifespan, cast iron will cost around a third of plastic.
Our hopper heads are available with a wide range of pipe connections to suit round, square, and rectangular downpipes. The Calnethorpe No.11 accepts round 65mm, 75mm, and 100mm; square 75×75mm, 100×100mm, and 125×125mm; and rectangular 100×75mm, 125×100mm, and 150×100mm. Connection options vary by model — please contact us to confirm availability for your chosen hopper.
Our cast iron hopper heads are available in a choice of finishes including primer, painted, and specialist heritage finishes. Please call us on 0333 987 4452 or submit an enquiry to discuss the right finish for your project.
We are able to place dates and initials and insignia onto most of our flat faced rainwater hopper heads.
Cast iron hopper heads are priced on enquiry due to the range of connection and finish options available. Please call us on 0333 987 4452 or use the contact form and we will respond promptly with a quotation tailored to your project requirements.
Cast iron radiators cost no more to run than modern steel or aluminium radiators. Cast iron is a very efficient material at emitting heat, thus you have items like le creuset cast iron pans. Cast iron holds it’s heat extremly well, which means that the radiators stay warm for longer.
Our brackets are more commonly used on cast iron rainwater systems. Unlike plastic, cast iron is heavy and the weight keeps the gutter in position. As such our brackets do not normally have retaining clips which could lead to plastic or lightweight gutters blowing out of the bracket. The profile of your gutter should match that of our bracket but without the weight to keep it in place you may well encounter problems in bad weather.
Casting of iron is an imperfect processs. It is possible with some cast iron radiators that you will get minor imperfections in the surface finish. When radiators are painted this will reduce and over the years every additional coat of paint applied will provide a smoother more equal finish.
We do offer a range of Ogee patterned gutters in both straight and radius profiles. The straight profiles are much more common and as such cost less.


