Top 7 125mm to 100mm Reducer UK – Ducting

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1. Kair

5 to 4 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units, Kair Ducting Reducer 125mm to 100mm

Kair - Will fit over male fittings bends etc. Compatible with 100mm and 125mm ducting systems including the extensive Kair SYS-100 & SYS-125 range of fittings, outlets, and grilles.

Adaptor to convert between 125mm and 100mm ducting - 5 to 4 inch. On the other side there is a 100mm 4 inch male spigot. On one side there is a 125mm 5 inch female spigot. Perfectly suited for ducting your tumble Dryer, Hydroponics, In-Line Fans, Bathroom or Kitchen extractor fan, or Cooker Hoods and other ventilation applications. Will fit into 100mm straight ducting. Requires additional 125mm male connector to connect round 125mm pipe.
BrandKair
ManufacturerKair
Height6.2 cm (2.44 Inches)
Length12.9 cm (5.08 Inches)
Weight0.04 kg (0.09 Pounds)
Width12.9 cm (5.08 Inches)
Part NumberDUCVKC603

2. DOMUS

Circular Spigot Adapter 125mm to 100mm Duct Reducer

DOMUS - Compatible with Domus and Kair System 100 Ducting. Domus 119 circular Plastic Ducting Reducer. Ideal for easily changing to an alternative profile or size. 125mm to 100mm.
BrandDOMUS
ManufacturerDOMUS
Part Number119
Model119

3. i-sells

I-sells Metal Ducting Short Reducer 125mm to 100mm Concentric Pressed Reducer

i-sells - Can be used with the extensive range of i-sells metal ducting connectors and fittings. Our fittings are produced in accordance with DW144 and have a rolled edge making handling safer, and improving alignment. Male spigots will slip inside female sockets or spiral duct pipe. Fittings should be secured using the appropriate fixing method such as sealants or tapes. 125mm to 100mm metal Ducting Short Concentric Reducer. A female coupling will be required to join two male fittings.
Brandi-sells
Manufactureri-sells
Part NumberGALRC125100

4. Vortex

Vortex Reducer 5 inch- 4 inch 125mm-100mm

Vortex - The vortex ducting reducer a is simple to use and heavy-duty reducer which is ideal for matching different sizes of fan and ducting.
BrandVortex
ManufacturerVortex

5. Invero

Invero® Straight 125mm to 100mm Ducting Reducer/Adaptor White

Invero - On the other side there is a 100mm Male Spigot - Will fit into 100mm straight ducting. 125mm female to 100mm Male Round Ducting Adaptor. Dimensions : 125mm to 100mm. Colour: White. On one side there is a 125mm Female Spigot - Will fit over male fittings bends etc.
BrandInvero
ManufacturerInvero®

6. Kair

Kair 125mm to 100mm Offset Reducer Plastic Duct

Kair - Ducvkc621 has been designed for use with KairSystem 125 & 100 Round. The ducvkc621 offset reducer is manufactured from white high impact polystyrene and has a minimum free area of 8, 011mm and a male connection for the inside of the System 125 fitings and a female connection for the System 100 fittings.

Ducvkc621 is manufactured in compliance with Domestic Plastic Ductwork Specification DW/154 and does meet UL94HB flammability standard. The ducvkc621 is fully compliant with sap appendix Q Product Characteristics Database recommendations for duct sizes used with both extract and Mechanical Heat Recovery systems.
BrandKair
ManufacturerKair
Part NumberDUCVKC621

7. Fantronix

5 to 4 inch Duct Pipe Reduction Connector for Extractor Fans Tumble Dryer Cooker Hood and Ventilation Units, Fantronix Round Ducting Reducer 125mm to 100mm

Fantronix - Requires additional 125mm male connector to connect round 125mm pipe. Designed and intended for use in the ventilation systems in both the inner and outer of the building, made of high-quality material, which is resistant to external factors high quality PVC plastic.

On the other side there is a 100mm 4 inch male spigot. On one side there is a 125mm 5 inch female spigot. Will fit into 100mm straight ducting or 102mm flexible ducting. Keeps technical and hygienic properties in changing operating conditions. High quality material: high-quality white polystyrene/polypropylene plastic Material. Lightweight, and easy to install. Max / min temperature: +60c / -15c. Easy to install: adaptor to convert between 125mm and 100mm ducting - 5 to 4 inch.

This is a very practical robust solid duct reducer to be used when connecting two different plastic pipes, quick, solid or flexible ducting together. Does not corrode and get aesthetic appearance throughout the entire operating life. Will fit over male fittings bends etc. Uses: perfectly suited for ducting your tumble dryer, Bathroom or Kitchen extractor fan, In-Line Fans, hydroponics, or Cooker Hoods and other ventilation applications.
BrandFantronix
ManufacturerFANTRONIX