Free delivery available | Free Help & Advice: hello@efans.co.uk | Mon - Fri 9:00am - 5:00pm

Next Working Day Delivery

On select items. Order by 12pm

Credit Accounts

Pay on 30-day terms

Easy 14 day returns

No quibble easy returns

Trustpilot Rated Excellent

4.9 out of 5 stars

100mm Round PVC Ducting Pipe

18 products

100mm round ducting, also called 4 inch ducting or Domus EasiPipe 100, is rigid push fit PVC duct for bathroom, toilet and utility extract fans, standard cooker hoods and tumble dryer extract. We stock 2m and 350mm straight lengths, 90° and 45° bends, T and Y pieces, straight connectors, connectors with a backdraught damper and wall plate, hose connectors, spigot adaptors to 80mm, 110mm, 125mm and 150mm, a Thermal insulated bend shell, and flexible EasiPipe hose in 15m and 45m coils. All parts push fit together, and are in stock for next working day delivery. Use the buttons below to filter by part type, or send us your layout for a parts list: email hello@efans.co.uk or call 0161 399 3825.

Read moreRead less

Frequently asked questions

What is 100mm round ducting?

100mm round ducting is rigid PVC duct with a 100mm diameter, also called 4 inch ducting. In the Domus range it is called EasiPipe 100. It suits bathroom, toilet and utility extract fans, standard cooker hoods and tumble dryer extract.

Is 100mm the same as 4 inch ducting?

Yes. 100mm is the metric size and 4 inch the imperial name for the same duct. Any fan, cooker hood or wall kit sold as 4 inch will fit 100mm ducting.

Rigid or flexible ducting?

Use rigid duct for the main run. It has lower resistance, makes air tight push fit joints and does not sag or collect grease and dust. Use flexible hose only for short final connections, ideally under 1m, pulled taut and clipped with a Jubilee clip.

How do I join 100mm duct?

Push the plain end of one length into the socket of the next, or use a straight connector to join two plain ends. Tape each joint with aluminium duct tape for an air tight seal, and support horizontal runs every 600 to 800mm so they do not sag.

Do I need to insulate the duct?

Yes, wherever the duct runs through a cold space such as an unheated loft. Warm moist air hitting a cold duct wall condenses inside and can drip back to the fan. Use Domus Thermal insulation shells on bends and wrap straight runs in duct insulation.

100mm round or 110 x 54mm flat?

They suit the same fans. Use 100mm round where there is room, as it is cheaper and has lower resistance. Use 110 x 54mm flat duct where depth is tight, such as above kitchen wall units or between joists.

How long can a 100mm duct run be?

It depends on the fan. Many 100mm extract fans allow around 6 to 12m of equivalent duct length. Each 90° bend adds about 1m and each 45° bend about 0.5m. If the run is too long, use fewer bends, step up to 125mm or choose a more powerful fan.

Straight Duct Bends Connectors Tee & Y Pieces Adaptors Flexible Hose

Showing 1 - 18 of 18 products

Rigid 100mm round duct from Domus Ventilation's EasiPipe series, 2 meters long, for efficient ventilation and ducting installations.

Rigid 100mm round duct from Domus Ventilation's EasiPipe series, 2 meters long, for efficient ventilation and ducting installations.

Out of stock

Contact us for an estimated delivery date

domus ventilation

SKU: 1200-4

Domus 1200-4 EasiPipe Rigid Round Duct 100mm x 2m

100mm diameter
2m straight length
EasiPipe 100

Out of stock

Contact us for an estimated delivery date

£17.27

Domus 493 EasiPipe straight connector for ducting, 100mm diameter, rigid plastic fitting for ventilation systems.

Domus 493 EasiPipe straight connector for ducting, 100mm diameter, rigid plastic fitting for ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 493 EasiPipe Straight Connector 100mm

100mm diameter
Straight connector
EasiPipe 100

In stock

Next day delivery available

£3.83

Rigid 90-degree bend for 100mm Domus EasiPipe ducting, used for efficient ventilation duct installation.

Rigid 90-degree bend for 100mm Domus EasiPipe ducting, used for efficient ventilation duct installation.

In stock

Next day delivery
available

domus ventilation

Domus 490 EasiPipe 90° Bend 100mm

100mm diameter
90° bend
EasiPipe 100

In stock

Next day delivery available

£6.55

Rigid 45° duct bend from Domus EasiPipe ventilation ducting system, 100mm diameter, for efficient air flow.

Rigid 45° duct bend from Domus EasiPipe ventilation ducting system, 100mm diameter, for efficient air flow.

In stock

Next day delivery
available

domus ventilation

Domus 491 EasiPipe 45° Bend 100mm

100mm diameter
45° bend
EasiPipe 100

In stock

Next day delivery available

£5.69

Domus Ventilation EasiPipe round adaptor, 100mm to 125mm ducting connector for ventilation systems

Domus Ventilation EasiPipe round adaptor, 100mm to 125mm ducting connector for ventilation systems

In stock

Next day delivery
available

domus ventilation

Domus 119 EasiPipe Round Adaptor 100mm to 125mm

100mm to 125mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£3.19

Domus Ventilation EasiPipe round ducting adapter, 100mm to 150mm, for connecting ventilation ducts with smooth transition.

Domus Ventilation EasiPipe round ducting adapter, 100mm to 150mm, for connecting ventilation ducts with smooth transition.

In stock

Next day delivery
available

domus ventilation

Domus 619 EasiPipe Round Adaptor 100mm to 150mm

100mm to 150mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£4.32

Domus Ventilation Domus 120 EasiPipe round ducting adaptor, 110mm to 100mm for connecting ventilation ducts.

Domus Ventilation Domus 120 EasiPipe round ducting adaptor, 110mm to 100mm for connecting ventilation ducts.

In stock

Next day delivery
available

domus ventilation

Domus 120 EasiPipe Round Adaptor 110mm to 100mm

110mm to 100mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£2.72

Domus Ventilation Domus 135-4 EasiPipe rigid round duct 100mm x 350mm for HVAC ventilation systems.

Domus Ventilation Domus 135-4 EasiPipe rigid round duct 100mm x 350mm for HVAC ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 135-4 EasiPipe Rigid Round Duct 100mm x 350mm

100mm diameter
350mm straight length
EasiPipe 100

In stock

Next day delivery available

£3.49

Rigid 100mm Domus Ventilation EasiPipe T-Piece for ducting systems, shown in this image.

Rigid 100mm Domus Ventilation EasiPipe T-Piece for ducting systems, shown in this image.

In stock

Next day delivery
available

domus ventilation

Domus 492 EasiPipe T-Piece 100mm

100mm diameter
T-piece
EasiPipe 100

In stock

Next day delivery available

£12.35

Domus Ventilation Domus 499 EasiPipe Y-piece 100mm ducting fitting for ventilation systems, shown in the image.

Domus Ventilation Domus 499 EasiPipe Y-piece 100mm ducting fitting for ventilation systems, shown in the image.

In stock

Next day delivery
available

domus ventilation

Domus 499 EasiPipe Y-Piece 100mm

100mm diameter
Y-piece
EasiPipe 100

In stock

Next day delivery available

£11.48

Domus Ventilation EasiPipe round ducting adaptor 100mm to 80mm for efficient ventilation system connections.

Domus Ventilation EasiPipe round ducting adaptor 100mm to 80mm for efficient ventilation system connections.

In stock

Next day delivery
available

domus ventilation

Domus DD019 EasiPipe Round Adaptor 100mm to 80mm

100mm to 80mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£4.74

Domus Ventilation TS490 EasiPipe 90° bend insulation shell for 100mm ducting, showing smooth, insulated duct connection.

Domus Ventilation TS490 EasiPipe 90° bend insulation shell for 100mm ducting, showing smooth, insulated duct connection.

In stock

Next day delivery
available

domus ventilation

Domus TS490 EasiPipe 90° Bend Insulation Shell 100mm

100mm
90° bend insulation shell
EasiPipe 100

In stock

Next day delivery available

£9.09

Domus 380 EasiPipe flexible hose connector for ducting, 100mm diameter, used in ventilation systems, made by Domus Ventilation.

Domus 380 EasiPipe flexible hose connector for ducting, 100mm diameter, used in ventilation systems, made by Domus Ventilation.

In stock

Next day delivery
available

domus ventilation

Domus 380 EasiPipe Flexible Hose Connector 100mm

100mm diameter
Hose connector
EasiPipe 100

In stock

Next day delivery available

£1.38

Domus 124-4 EasiPipe threaded hose connector for ducting, 100mm, used for ventilation system connections.

Domus 124-4 EasiPipe threaded hose connector for ducting, 100mm, used for ventilation system connections.

In stock

Next day delivery
available

domus ventilation

Domus 124-4 EasiPipe Threaded Hose Connector 100mm

100mm
Threaded hose connector
EasiPipe 100

In stock

Next day delivery available

£1.16

Domus Ventilation Domus 494 EasiPipe straight duct connector with damper, 100mm diameter, for ventilation ducting system.

Domus Ventilation Domus 494 EasiPipe straight duct connector with damper, 100mm diameter, for ventilation ducting system.

In stock

Next day delivery
available

domus ventilation

Domus 494 EasiPipe Straight Connector with Damper 100mm

100mm diameter
Connector with damper
EasiPipe 100

In stock

Next day delivery available

£4.20

Domus Ventilation EasiPipe flexible ducting hose, 100mm diameter, 45m length, durable and lightweight for ventilation systems

Domus Ventilation EasiPipe flexible ducting hose, 100mm diameter, 45m length, durable and lightweight for ventilation systems

In stock

Next day delivery
available

domus ventilation

Domus 3645 EasiPipe Flexible Hose 100mm x 45m

100mm diameter
45m flexible hose
EasiPipe 100

In stock

Next day delivery available

£51.47

Flexible 100mm x 15m Domus EasiPipe ducting hose for ventilation systems, shown in the image.

Flexible 100mm x 15m Domus EasiPipe ducting hose for ventilation systems, shown in the image.

In stock

Next day delivery
available

domus ventilation

Domus 3615 EasiPipe Flexible Hose 100mm x 15m

100mm diameter
15m flexible hose
EasiPipe 100

In stock

Next day delivery available

£27.19

Domus 495 EasiPipe ducting connector with damper and wall plate, 100mm diameter for ventilation systems.

Domus 495 EasiPipe ducting connector with damper and wall plate, 100mm diameter for ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 495 EasiPipe Connector with Damper and Wall Plate 100mm

100mm diameter
Damper and wall plate
EasiPipe 100

In stock

Next day delivery available

£5.02