120mm to 100mm reducer
120mm to 100mm reducer for sale on Ireland's largest auction and classifieds sites
Brand new duct reducer 120mm - brand-new, - £7.90
Brand new duct • Reducer 120mm 100mm • Precise reduction stainless - Free postage - New and Used
Brand new duct • Reducer 120mm 100mm • Precise reduction stainless - Free postage - New and Used
Metal reducer 80mm - metal, to - £8.65
Metal reducer 80mm • 100mm mixed flow • Extractor fan heating - Free postage - New and Used
Metal reducer 80mm • 100mm mixed flow • Extractor fan heating - Free postage - New and Used
Metal reducer 150mm - reducer, - £8.86
Metal reducer 150mm • 100mm mixed flow • Metallic finish has - Free postage - New and Used
Metal reducer 150mm • 100mm mixed flow • Metallic finish has - Free postage - New and Used
Brand new duct reducer 120mm - duct, - £8.35
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
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Brand new duct - duct, reducer - £8.38
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
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48 listings · from £5.16 · avg £9.13
⚠️ These listings were last updated more than 16 days ago.
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Browse 48 120mm to 100mm reducer listings currently in our index. Prices range from £5.16 to £25, with an average of £9.13. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about 120mm to 100mm reducer →
Precise size reduction - size, - £7.81
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Brand new duct reducer - brand-new, 120mm - £8.90
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Dust extraction hose reducer - dust, - £25.00
- Free postage - New and Used
- Free postage - New and Used
Duct reducer 120mm 100mm - 120mm, to - £8.90
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Easy install solution 120mm - easy, - £8.36
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Brand new duct reducer - brand-new, - £7.38
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Brand new duct - brand-new, - £8.28
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Silver flue pipe reducer - flue, - £10.02
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Duct pipe reducer 125mm - reducer, to - £11.86
Brand new reducer • Connect 125mm 100mm • Air duct pipe - Free postage - New and Used
Brand new reducer • Connect 125mm 100mm • Air duct pipe - Free postage - New and Used
125mm 100mm reducer - 125mm, - £9.37
125mm 100mm ducting • Reducer adaptor sys • 100 kair round - Free postage - New and Used
125mm 100mm ducting • Reducer adaptor sys • 100 kair round - Free postage - New and Used
Application silver stainless - application, - £8.51
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Precise size reduction heat - size, - £5.16
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Easy installation with - with, 120mm - £7.06
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Duct reducer adapters - reducer, - £13.46
This duct reducing • Adapter made from • Durable abs material - Free postage - New and Used
This duct reducing • Adapter made from • Durable abs material - Free postage - New and Used
Reducer 200mm 100mm - to, - £15.08
Reducer 200mm 100mm • Set mixed flow • Reducers made metal - Free postage - New and Used
Reducer 200mm 100mm • Set mixed flow • Reducers made metal - Free postage - New and Used
Easy use duct reducer - to, - £7.90
Direct connection round • Air ducts available • Variants 100 130 - Free postage - New and Used
Direct connection round • Air ducts available • Variants 100 130 - Free postage - New and Used
Reducer 200mm 100mm - to, - £21.50
Product metal mixed • Flow reducer that • Can reduce diameter - Free postage - New and Used
Product metal mixed • Flow reducer that • Can reduce diameter - Free postage - New and Used
Enhance your ventilation - enhance, - £8.77
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Efficient ventilation silver - ventilation, - £8.20
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Seamless connection stainless - seamless, - £8.20
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Leak resistant silver - leak, - £7.68
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Safe venting with silver - safe, - £8.65
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Easy use duct - easy, to - £6.95
Direct connection round • Air ducts available • Variants 100 130 - Free postage - New and Used
Direct connection round • Air ducts available • Variants 100 130 - Free postage - New and Used
Stainless steel chimney - stainless, - £9.06
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Fade resistant duct reducer - resistant, - £7.78
This chimney pipe • Reducer suitable use • Chimneys fireplaces stoves - Free postage - New and Used
This chimney pipe • Reducer suitable use • Chimneys fireplaces stoves - Free postage - New and Used
Stainless steel chimney - stainless, - £7.96
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
120mm 100mm reducing flue - 100mm, - £7.87
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Easy install round - install, - £8.98
Direct connection round • Air ducts real • Color item may - Free postage - New and Used
Direct connection round • Air ducts real • Color item may - Free postage - New and Used
Mobi aluminium duct - mobi, - £11.03
100mm 120mm • Mobi aluminium duct • Reducer high quality - Free postage - New and Used
100mm 120mm • Mobi aluminium duct • Reducer high quality - Free postage - New and Used
Efficient venting with - venting, silver - £7.96
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Efficient venting with - venting, - £7.06
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Secure connection heat - secure, - £7.82
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Abs ventilation pipe - ventilation, - £6.90
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Efficient ventilation silver - efficient, - £7.16
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Efficient venting with silver - with, - £13.10
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Leak connection silver - leak, - £8.18
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Abs ventilation pipe adapter - abs, - £5.18
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Abs ventilation pipe adapter - ventilation, - £8.41
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Abs ventilation pipe reducer - pipe, - £5.32
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Ventilation pipe reducer • Adapter suitable all • Connections there are - Free postage - New and Used
Seamless ventilation pipe - seamless, - £8.41
Ventilation pipe reducer • Adapter type 100 • 125 110 150 - Free postage - New and Used
Ventilation pipe reducer • Adapter type 100 • 125 110 150 - Free postage - New and Used
Brand new duct - duct, 120mm - £8.04
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Reduction from 120mm • 100mm this chimney • Pipe reducer allows - Free postage - New and Used
Easy installation with - installation, - £7.98
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
This chimney pipe • Reduction from 120mm • Reducer allows seamless - Free postage - New and Used
Stainless steel 120mm 100mm - stainless, - £9.06
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
Bend type reducer • Flue pipe long • Lasting stainless steel - Free postage - New and Used
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Everything you need to know about 120mm to 100mm reducer
Whether you are looking for a brand-new or second-hand 120mm to 100mm reducer, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £5.16, while premium listings can reach £25 — giving you a wide budget spread to work with. The average price of £9.13 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.