R-100-80
£6.34 (excl. VAT) / £7.61 (incl. VAT)
R-125-100

Spiral Ducting & Fittings

125mm Reducer for Spiral Ductwork

£6.34 (excl. VAT) / £7.61 (incl. VAT)
R-150-100

Spiral Ducting & Fittings

150mm Reducers for Spiral Ductwork

£6.34£10.74
R-160-100

Spiral Ducting & Fittings

160mm Reducers for Spiral Ductwork

£6.34£11.47
R-180-100

Spiral Ducting & Fittings

180mm Reducers for Spiral Ductwork

£11.47
R-200-100

Spiral Ducting & Fittings

200mm Reducers for Spiral Ductwork

£7.85£14.64
R-224-100

Spiral Ducting & Fittings

224mm Reducers for Spiral Ductwork

£12.58£22.35
R-250-100

Spiral Ducting & Fittings

250mm Reducers for Spiral Ductwork

£10.36£21.93
R-280-125

Spiral Ducting & Fittings

280mm Reducers for Spiral Ductwork

£26.42
R-300-125

Spiral Ducting & Fittings

300mm Reducers for Spiral Ductwork

£17.16£31.55
R-315-150

Spiral Ducting & Fittings

315mm Reducers for Spiral Ductwork

£17.77£31.55
R-355-150

Spiral Ducting & Fittings

355mm Reducers for Spiral Ductwork

£33.57£36.92
R-400-150

Spiral Ducting & Fittings

400mm Reducers for Spiral Ductwork

£37.76£52.15
R-450-200

Spiral Ducting & Fittings

450mm Reducers for Spiral Ductwork

£38.99£46.48
R-500-200

Spiral Ducting & Fittings

500mm Reducers for Spiral Ductwork

£43.22£54.74
R-560-250

Spiral Ducting & Fittings

560mm Reducers for Spiral Ductwork

£62.06
R-600-250

Spiral Ducting & Fittings

600mm Reducers for Spiral Ductwork

£76.94
R-630-000

Concentric Reducers for Ventilation Duct

630mm Reducers for Spiral Duct

£76.94
R-710-000

Spiral Ducting & Fittings

710mm Reducers for Spiral Ductwork

£110.20
R-800-560

Spiral Ducting & Fittings

800mm Reducers for Spiral Ductwork

£128.59

Concentric Reducers for Ventilation Duct

  • A reducer is a fitting used in ventilation systems between two pipes of different diameters. Concentric reducers chance the diameter of a duct run to assist air flows.
  • All of our reducers are concentric, eccentric reducers are available on request.
  • Reducers up to 315mm diameter are pressed reducers, 355mm and above are fabricated reducers.
  • Reducers for spiral ducting are all male fittings and fit directly into circular spiral ducting (secure using recommended fixing methods).
  • For a male to male connection i.e reducer to spigot a Female coupler should be used.

What is the difference between a concentric & eccentric reducer?

  • A concentric reducer, is shaped like a cone and the centre line is directly in the middle of the two diameters.
  • An eccentric reducer has an edge that is parallel to the connecting pipe and creates an offset in the centre line of the ventilation duct run.