This reducer collar steps down the ducting diameter from 150mm (6") to 125mm (5"), connecting a 150mm round spigot or duct outlet to a 125mm round ducting run. It is most commonly used to connect the motor housing spigot of a cooker hood or extractor fan directly to a 125mm round duct pipe where the motor outlet is 150mm but the duct run is 125mm. It is part of the Luxair 6" airtight ducting system.
Where This Component Is Used
Use this reducer wherever the ducting needs to step down from 150mm to 125mm — typically at the motor outlet where the hood's 150mm spigot connects to an existing or preferred 125mm duct run, or where a 6" duct section terminates into a 5" run. Always check your motor outlet diameter and intended duct size before ordering to confirm this is the correct reducer direction for your installation.
Ducting Size Guide
Selecting the correct ducting diameter for your motor output ensures maximum extraction performance:
Below 450m³/hr → 100mm (4") ducting
450–750m³/hr → 125mm (5") or 150mm (6") ducting
750–2,000m³/hr → 150mm (6") or 200mm (8") ducting
✓ 150mm to 125mm ducting reducer collar — steps down from 6" to 5" round ducting diameter
✓ Connects 150mm motor housing spigot to 125mm round duct run — most common use at the cooker hood or extractor fan outlet
✓ Check motor outlet diameter before ordering — this reducer steps down from 150mm to 125mm; confirm direction before purchasing
✓ Push-fit airtight connection — no ducting tape, adhesive or clips required
✓ Part of the Luxair 6" (150mm) airtight ducting system — compatible with 220mm × 90mm flat and 150mm round components
✓ Suitable for kitchen, bathroom, utility room and whole-house extract systems
✓ Fast UK despatch — express overnight service available
View All Other ducting sizes and vents collections
