90 degree bends can be used to run your ductwork around obstacles along walls and into ceilings and offers superior performance and durability over flexible alternatives.
Kair plastic ducting is lightweight, durable and suitable for commercial and domestic use. It is perfectly suited for ducting your tumble dryer, bathroom or kitchen extractor fan, hydroponics, in-line extract fans, or cooker hood. It can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input, air conditioning, HVAC, and heat recovery systems.
We always recommend to use as few bends as possible in your duct run to reduce any loss of pressure, this also applies when connecting smaller to larger ducting.
When supplying air through a powerful fan, ensure that the ducting is not too narrow as this could lead to an increase of air noise, damage to the fan and potential vibration.
Through the use of adapters, multiple connections to all other systems are possible.
Alternative Sizes & Angles:
Here at i-sells.co.uk we stock a large range of galvanised products including 90 degree and 45 degree bends. We recommend our 'safe seal' galvanised bends, which are available in a huge variety of sizes from 63mm up to 1600mm.
Click here to view our full range of galvanised safe-seal bends.
If your duct run passes through a particularly cold area, we would recommend considering using our pre-insulated ducting to avoid condensation building up within your ductwork. Click here to view our range of pre-insulated plastic ducting.
Looking for compatible products?
Compatible with the extensive Kair SYS-100 range of fittings, outlets, and grilles.
All of our Kair products have a full 30-day money back guarantee.
|Round System (mm)||125|
|Product Group||Plastic Ducting|
|Spigot size (mm)||125|
|Packaged Weight (Kg)||0.134|
|Packaged Length (mm)||160|
|Packaged Width (mm)||124|
|Packaged Height (mm)||160|
|Temp Max (°C)||60|
|Temp Min (°C)||-15|
|Vent Axia (similar)||427360|
|Polypipe / Domus (similar)||590|
|Pressure Loss (Pa) 15 l/s||2|
|Pressure Loss (Pa) 30 l/s||8.4|
|Pressure Loss (Pa) 60 l/s||34.9|
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Do you do a male to female 125mm bend
I am not aware of an off-the-shelf plastic 125mm male to 125mm female 90 degree bend but you can use a cut down length of plastic pipe or a galvanised metal female sleeve connector (Part: "GALMF-125") to achieve a similar result.
is this product female to female,ie will it fit directly in to a 125mm pipe.
Hello, could you pls check why this item is showing as awaiting return status? All items were returned at the Sidcup store a while ago therefore should be settled. Thanks, Rajat
Can this be solvent welded? If ABS or PVC, it can. If Polyproplyene, it can not.
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|Ducting System||Actual dimensions (mm)||Space requirements (mm)||Airflow mm²|
For 4" (100mm) extractor fans or for low power cooker hoods up to 250m³/hour
|System 100 - Round||100||106||7,854|
|System 100 - Rectangular||110 x 54||116 x 60||5,940|
For medium extraction rates or if available depth is limited up to 500m³/hour
|System 125 - Round||125||131||12,272|
|System 125 - Rectangular||150 x 70||156 x 76||10,500|
For 6" (150mm) extractor fans or for high power cooker hoods up to 500m³/hour & above
|Megaduct 220 - Rectangular||220 x 90||227 x 97||17,968|
|System 204 - Rectangular||204 x 60||210 x 66||12,240|
|System 150 - Round||150||156||17,671|
|System 150 - Rectangular||180 x 90||186 x 96||16,200|
For a shallow space, such as ceiling voids or under floor, where high extraction rates are not needed:
|System 300 - Rectangular||308 x 29||314 x 35||8,932|
|System 225 - Rectangular||234 x 29||240 x 35||6,786|
| System 100 |
| System 125|
| System 150|
|System 204||System 225|
|System 220||System 300|
|Actual Dimensions (mm) Space Requirements (mm)|