£1.96 £2.35 inc VAT
In stock and ready for dispatch
150mm to 125mm Rigid plastic Reducer
Round duct is suitable for long duct runs where space is unrestricted. This round system is particularly suitable for use in bathrooms, toilets and utility rooms.
Excellent airflow characteristics with minimum air turbulence
Also available a wide range of duct fittings, including bends, duct insulation and integrated fire stopping components, along with internal and external terminals.
Manufactured from flame retardant polymer.
Lightweight with simple to fit connections for duct fittings, extractor fans and air terminal devices
Straight pipe connectors are required to connect two lengths of pipe together
Please call if you require any assistance or help choosing the correct products. Our aim is to ensure that your purchase goes smoothly and is delivered on time.
Please note: we may send out like for like products from different manufacturers.
You can call us on 01455 616 444 or email [email protected]
Visit our trade counter: Unit 3 Claymill Road, Leicester, LE4 9JJ. We are open from Monday to Thursday 8am till 5pm and Friday 8am till 3pm.
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Stepping down increases air velocity and static pressure. That can lower overall airflow on long/complex runs and may make fans work harder. Keep the transition as short and smooth as possible and check your fan’s performance curve if airflow is critical.
Push-fit the reducer fully into the matching female duct/fitting until it seats. Seal joints with foil tape or duct mastic, and support adjacent ducting with clips/hangers to prevent movement.
Possibly. Higher air velocity through the 100 mm section can add turbulence and noise, especially near bends. Minimising kinks, keeping runs short/straight, and using smooth-bore rigid ducting helps keep noise down.
Yes for typical domestic/commercial extractor fans and MVHR/ventilation systems. For high static pressure industrial setups, confirm suitability against your system specs; some applications may require metal components or purpose-rated fittings.
If warm, moist air passes through unheated areas, add insulation (or use insulated duct nearby) to reduce condensation risk and heat loss.
It’s a rigid, flame-retardant plastic reducer suitable for standard ventilation temperatures. It’s not designed for very high-temperature extraction.
“Male” ends push into duct or fittings. “Female” ends accept a male spigot. This reducer’s ends act as male spigots for 150 mm and 100 mm round plastic duct/fittings.
If the fan spigot is female, the reducer can push straight in. If the fan spigot is male, sleeve the joint with a short piece of matching round duct or use a straight female connector for a neat, airtight fit.
