G.A.S Ducting Reducer – Aluminium Duct Adaptor
G.A.S Ducting Reducer – Aluminium Duct Adaptor
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
- 14-day returns
- Price match promise
- Free Wembley store pickup
- Advice from the team: 020 3488 0419
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Description
Make a mismatched fan, filter and ducting fit together properly
This Ducting Reducer steps a larger fan or filter outlet down to a smaller diameter of ducting, the common fix when your extraction fan is a size up from the ducting or vent it needs to connect to. It's pressed from quality G.A.S metalwork in a clean aluminium finish, so it seats securely under a clamp and won't rattle loose or corrode in a humid grow room.
Key Benefits
- Size adaptation between mismatched fan, filter and ducting diameters
- Aluminium construction for a rigid, corrosion-resistant fit
- Clean pressed finish that seats tightly with standard fast clamps or jubilee clips
- Airtight transition that keeps extraction efficient with no leaks
Fan and ducting sizes that don't match?
Trying to force oversized ducting onto a smaller fan spigot (or vice versa) leaves gaps that leak air, kill static pressure and let odour escape. A properly sized reducer gives both ends a solid, sealed seat so the run stays airtight and quiet.
How to Use
- Fit the wider end onto your fan or filter outlet
- Fit the narrower end onto your ducting
- Secure both joins with a fast clamp or jubilee clip to keep the connection airtight

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.

