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125mm Round PVC Ducting Pipe

18 products

125mm round ducting, also called 5 inch ducting or Domus EasiPipe 125, is rigid push fit PVC duct for larger cooker hoods, inline extract fans, MVHR branch runs and longer domestic extract runs. We stock 2m and 350mm straight lengths, a telescopic section adjustable from 250mm to 450mm, 90° and 45° bends, Thermal insulated bend shells, T and Y pieces, straight connectors, connectors with a backdraught damper, a spigot connector with damper and wall plate, hose connectors, adaptors to 100mm, 150mm and 204 x 60mm flat duct, and pipe clips. 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.

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Frequently asked questions

What is 125mm round ducting?

125mm round ducting is rigid PVC duct with a 125mm diameter, also called 5 inch ducting. In the Domus range it is called EasiPipe 125. It suits larger cooker hoods, inline extract fans, MVHR branch runs and longer domestic extract runs.

Is 125mm the same as 5 inch ducting?

Yes. 125mm is the metric size and 5 inch the imperial name for the same duct. Any fan, cooker hood or wall kit sold as 5 inch will fit 125mm 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 125mm 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.

125mm round or 204 x 60mm flat?

They suit the same fans and cooker hoods. Use 125mm round where there is room, as it is cheaper and has the lowest resistance. Use 204 x 60mm flat duct where depth is tight, and join the two with a round to rectangular adaptor.

How long can a 125mm duct run be?

125mm has much lower resistance than 100mm, so it handles longer runs. Check the fan's datasheet for its maximum, and allow about 1.2m of equivalent length for each 90° bend and 0.6m for each 45° bend.

Straight Duct Bends Connectors Tee & Y Pieces Adaptors Pipe Clips

Showing 1 - 18 of 18 products

Rigid round duct from Domus Ventilation, 125mm diameter, 2 meters long, with smooth metallic surface and fitting ends for ventilation.

Rigid round duct from Domus Ventilation, 125mm diameter, 2 meters long, with smooth metallic surface and fitting ends for ventilation.

Out of stock

Contact us for an estimated delivery date

domus ventilation

SKU: 1200-5

Domus 1200-5 EasiPipe Rigid Round Duct 125mm x 2m

125mm diameter
2m straight length
EasiPipe 125

Out of stock

Contact us for an estimated delivery date

£21.12

Domus Ventilation EasiPipe 90° duct bend for rigid 125mm ducting, showing the curved 90-degree duct connection.

Domus Ventilation EasiPipe 90° duct bend for rigid 125mm ducting, showing the curved 90-degree duct connection.

In stock

Next day delivery
available

domus ventilation

Domus 590 EasiPipe 90° Bend 125mm

125mm diameter
90° bend
EasiPipe 125

In stock

Next day delivery available

£11.28

Domus Ventilation EasiPipe 125mm straight duct connector for rigid ducting, used in ventilation systems.

Domus Ventilation EasiPipe 125mm straight duct connector for rigid ducting, used in ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 593 EasiPipe Straight Connector 125mm

125mm diameter
Straight connector
EasiPipe 125

In stock

Next day delivery available

£4.25

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 125mm T-Piece for ducting, rigid plastic fitting for ventilation systems.

Domus Ventilation EasiPipe 125mm T-Piece for ducting, rigid plastic fitting for ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus 592 EasiPipe T-Piece 125mm

125mm diameter
T-piece
EasiPipe 125

In stock

Next day delivery available

£15.19

Domus Ventilation EasiPipe 45° ducting bend, 125mm diameter, rigid plastic pipe for ventilation systems, showing the angled connector.

Domus Ventilation EasiPipe 45° ducting bend, 125mm diameter, rigid plastic pipe for ventilation systems, showing the angled connector.

In stock

Next day delivery
available

domus ventilation

Domus 591 EasiPipe 45° Bend 125mm

125mm diameter
45° bend
EasiPipe 125

In stock

Next day delivery available

£8.88

Domus Ventilation Domus 570 Supertube ducting adaptor from round to rectangular, 204x60mm to 125mm, for ventilation duct installation.

Domus Ventilation Domus 570 Supertube ducting adaptor from round to rectangular, 204x60mm to 125mm, for ventilation duct installation.

Out of stock

Contact us for an estimated delivery date

domus ventilation

Domus 570 Supertube Round to Rectangular Adaptor 204 x 60mm to 125mm

204 x 60mm to 125mm round
Round to rectangular adapter
Supertube

Out of stock

Contact us for an estimated delivery date

£8.38

Domus Ventilation EasiPipe round ducting adaptor, 125mm to 150mm, for connecting ventilation pipes with flexible, durable plastic.

Domus Ventilation EasiPipe round ducting adaptor, 125mm to 150mm, for connecting ventilation pipes with flexible, durable plastic.

In stock

Next day delivery
available

domus ventilation

Domus 118 EasiPipe Round Adaptor 125mm to 150mm

125mm to 150mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£3.19

Domus Ventilation EasiPipe rigid round duct in 125mm diameter and 350mm length, showing smooth metallic surface and connection ends.

Domus Ventilation EasiPipe rigid round duct in 125mm diameter and 350mm length, showing smooth metallic surface and connection ends.

In stock

Next day delivery
available

domus ventilation

Domus 135-5 EasiPipe Rigid Round Duct 125mm x 350mm

125mm diameter
350mm straight length
EasiPipe 125

In stock

Next day delivery available

£4.65

Domus Ventilation Domus TS590 EasiPipe 90° bend insulation shell for ducting, 125mm diameter, used in ventilation systems.

Domus Ventilation Domus TS590 EasiPipe 90° bend insulation shell for ducting, 125mm diameter, used in ventilation systems.

In stock

Next day delivery
available

domus ventilation

Domus TS590 EasiPipe 90° Bend Insulation Shell 125mm

125mm diameter
Insulation shell (90° bend)
EasiPipe 125

In stock

Next day delivery available

£10.01

Domus Ventilation Domus 599M EasiPipe Y-Piece 125mm ducting fitting for ventilation systems, showing the Y-shaped connector in silver finish.

Domus Ventilation Domus 599M EasiPipe Y-Piece 125mm ducting fitting for ventilation systems, showing the Y-shaped connector in silver finish.

In stock

Next day delivery
available

domus ventilation

Domus 599M EasiPipe Y-Piece 125mm

125mm diameter
Y-piece
EasiPipe 125

In stock

Next day delivery available

£19.98

Domus 580 EasiPipe flexible hose connector for ducting, 125mm diameter, used in ventilation systems and ducting accessories

Domus 580 EasiPipe flexible hose connector for ducting, 125mm diameter, used in ventilation systems and ducting accessories

In stock

Next day delivery
available

domus ventilation

Domus 580 EasiPipe Flexible Hose Connector 125mm

125mm diameter
Hose connector
EasiPipe 125

In stock

Next day delivery available

£1.87

Domus Ventilation TS591 EasiPipe 45° bend insulation shell for ducting, 125mm diameter, with insulated exterior and smooth interior.

Domus Ventilation TS591 EasiPipe 45° bend insulation shell for ducting, 125mm diameter, with insulated exterior and smooth interior.

In stock

Next day delivery
available

domus ventilation

Domus TS591 EasiPipe 45° Bend Insulation Shell 125mm

125mm
45° bend insulation shell
EasiPipe 125

In stock

Next day delivery available

£7.48

Domus Ventilation Domus 595 EasiPipe duct connector with damper and wall plate, 125mm diameter, for ventilation ducting systems

Domus Ventilation Domus 595 EasiPipe duct connector with damper and wall plate, 125mm diameter, for ventilation ducting systems

In stock

Next day delivery
available

domus ventilation

Domus 595 EasiPipe Connector with Damper and Wall Plate 125mm

125mm diameter
Damper and wall plate
EasiPipe 125

In stock

Next day delivery available

£7.83

Domus EasiPipe 125mm straight duct connector with damper for ventilation systems, made of durable plastic.

Domus EasiPipe 125mm straight duct connector with damper for ventilation systems, made of durable plastic.

In stock

Next day delivery
available

domus ventilation

Domus 594 EasiPipe Straight Connector with Damper 125mm

125mm diameter
Connector with damper
EasiPipe 125

In stock

Next day delivery available

£4.91

Domus Ventilation Domus 596 EasiPipe pipe fastener for ducting accessories, 125mm diameter, securely holds duct pipes.

Domus Ventilation Domus 596 EasiPipe pipe fastener for ducting accessories, 125mm diameter, securely holds duct pipes.

In stock

Next day delivery
available

domus ventilation

Domus 596 EasiPipe Pipe Fastener 125mm

125mm diameter
Pipe fastener
EasiPipe 125

In stock

Next day delivery available

£1.74

Domus EasiPipe round ducting adaptor, 100mm to 125mm, for ventilation systems, shown in the image.

Domus EasiPipe round ducting adaptor, 100mm to 125mm, for ventilation systems, shown in the image.

In stock

Next day delivery
available

domus ventilation

Domus 544 EasiPipe Round Adaptor 100mm to 125mm

100mm to 125mm
In-line reducer
EasiPipe

In stock

Next day delivery available

£1.82

Domus Ventilation Domus 130-5 EasiPipe telescopic duct, 125mm diameter, extendable from 250mm to 450mm, for ventilation systems

Domus Ventilation Domus 130-5 EasiPipe telescopic duct, 125mm diameter, extendable from 250mm to 450mm, for ventilation systems

In stock

Next day delivery
available

domus ventilation

Domus 130-5 EasiPipe Telescopic Duct 125mm x 250-450mm

125mm diameter
Telescopic section
EasiPipe 125

In stock

Next day delivery available

£12.50