Established 1893 | BS 460:2002 Certified | UK & International Supply | Expert Technical Support | 0333 987 4452
£28.50 ex VAT (£34.20 inc VAT)
Wavin Osma Roundline adjustable gutter brackets. Our bespoke top rafter rise and fall gutter bracket is designed to suit the Osma Roundline system and is available with black, white, brown, and grey riser cups. (galvanised thread and arm)
Osma Roundline guttering bracket, adjustable rise, and fall, top rafter
Osma Roundline OT914 Rise and Fall Bow and Pin Bracket
Bespoke made – 10 – 14 days.
Application Similar to Osma OT148G top rafter arm
UK delivery from £30. Fittings are despatched boxed. See delivery rates.
The OSRL-TRRF is a bespoke top rafter-mounted rise and fall gutter bracket, manufactured to suit the Wavin Osma Roundline half-round PVC guttering system. The top rafter variant is required where the fixing is to be made to the top surface of a rafter — on open eaves, cut roof constructions, or where the roof structure makes top-fixing the most practical option.
The bracket features a right-angled galvanised steel rafter plate for top-surface fixing, combined with a threaded steel riser column and a half-round bow-and-pin gutter cup compatible with the Roundline system. The adjustable riser allows fall to be set at the correct gradient along the run independently of roof pitch. Available in black or grey riser cup options.
Used on open eaves and cut roof constructions with Wavin Osma Roundline guttering, and on refurbishment projects where the existing roof structure dictates the fixing approach. Suitable for residential and light commercial applications.
Manufactured to order in black or grey. Lead time 10–14 working days from order confirmation.
System compatibility: Wavin Osma Roundline half-round PVC guttering system. For specification queries, call 0333 987 4452.
| Colour | Black, White, Brown, Grey |
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Please call 0333 987 4452 or use the contact form with the size, quantity and connection details, and we'll provide a quotation.
Yes. Cast iron hopper heads are the historically correct choice for listed and period buildings, and a like-for-like cast iron replacement is generally accepted without objection by conservation officers. We manufacture to BS 460 for genuine heritage character and durability.
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.
Yes. Cast iron is the material required by most conservation officers and listed building consents for the replacement or replication of traditional rainwater goods. Our hopper heads are produced in solid cast iron and we can assist with specification notes or material statements for planning purposes if required.
Yes. Traditional cast iron column radiators are the authentic choice for period interiors, and plain patterns such as the Victorian 4 column are usually preferred by conservation officers. Replacing radiators or altering pipe runs in a listed building may need listed building consent, so speak to the conservation officer before work starts.
The Antique Black finish is cast iron with a blackened surface — the most historically accurate finish for cast iron ironwork and the most appropriate for the majority of heritage applications. Polished Lacquered is cast iron with a bright polished surface sealed with clear lacquer, suited to interiors and sheltered locations where polished ironwork is the specification. Polished Brass is solid polished brass throughout — the correct choice where existing building fittings are in brass or where a warm metal tone is required.
Hopper heads are supplied in red oxide primer ready for on-site painting, or pre-finished in black. A full range of Heritage Colours in traditional linseed oil paint is also available on request — please contact us for the swatch chart.
The School Board Airbrick is suited to Victorian and Edwardian terraced housing, mid-century school buildings, civic halls, public baths, and converted institutional buildings. Its plain square-grid face matches the utilitarian aesthetic of late-Victorian construction and is also appropriate for new heritage-style builds in conservation areas.
Where a standard profile can't match an existing design, we offer a bespoke casting service in association with our pattern makers, typically with a 12–14 week lead time. Please call 0333 987 4452 or use the contact form to discuss your project.
Prices for standard cast iron hopper heads are shown on the product page. For larger quantities, bespoke sizing, heritage colour finishes, or full rainwater system specifications, please call 0333 987 4452 or use the contact form.
