125mm (5 inch)

This is our 125mm (5 inches) IL gas pipe category.

Our 125mm IL gas piping is an air-insulated gas vent system that is suitable for use with atmospheric gas appliances with zero or negative pressures in the flue. These are for gas appliances with draught hoods or with flue gas temperatures that do not exceed 250°C.

Our gas pipes are constructed in a range of straight lengths, associated fittings, and accessories. If you’re looking for 125mm gas pipes, then take a look at our range below.

The 125mm gas piping features a 0.3mm inner wall that is constructed from aluminium and the outer wall (also 0.3mm) is fabricated from Zalutite (steel that is coated in zinc and aluminium) with a 6mm air gap between the two casings. This effectively allows the inner wall to freely expand as the temperature changes inside the gas vent.

This insulated twin wall system has a 50mm distance to combustible materials and it is fitted together using a ‘twist-lock’ method. This means that the components can be pushed together and twisted to engage the locking device. Not only does this provide a secure and firm connection, but it also ensures ease of assembly.

View our range of 125mm gas piping, pipe connectors, adaptors, and gas vent terminals below.


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Length 1524mm (60in) - 125mm

1500mm (5 foot) fixed length pipe..

Our Price (ex VAT): £39.37 Inc VAT: £47.24

Length 914mm (36in) - 125mm

914mm (3 foot) fixed length pipe..

Our Price (ex VAT): £29.58 Inc VAT: £35.50

Length 457mm (18in) - 125mm

457mm (18 inch) fixed length pipe..

Our Price (ex VAT): £17.39 Inc VAT: £20.87

Length 305mm (12in) - 125mm

305mm (12 inch) fixed length pipe..

Our Price (ex VAT): £16.17 Inc VAT: £19.40

Length 152mm (6in) - 125mm

152mm (6 inch) fixed length pipe..

Our Price (ex VAT): £13.93 Inc VAT: £16.72

90 Tee - 125mm

90 degree tee, you will need a tee cap with this item...

Our Price (ex VAT): £38.29 Inc VAT: £45.95

Tee Cap - 125mm

Tee cap, used to cap the 90 degree tee..

Our Price (ex VAT): £16.89 Inc VAT: £20.27

Adjustable Length – 457mm (18in) – 125mm

Our 125mm telescopic adjustable length pipes can be adjusted from 50mm all the way to 457mm (18in) l..

Our Price (ex VAT): £17.56 Inc VAT: £21.07

Adjustable Length - 305mm (12in) - 125mm

50-305mm telescopic adjustable length pipe..

Our Price (ex VAT): £19.44 Inc VAT: £23.33

Draughthood Connector – 125mm

Our 125mm draughthood connectors are made from high-quality materials such as aluminium and zalutite..

Our Price (ex VAT): £9.63 Inc VAT: £11.56

Ridge Tile Adapter (Aluminium) - 125mm

Converts IL to an oblong shape to connect to a ridge tile outlet...

Our Price (ex VAT): £31.62 Inc VAT: £37.94

Adjustable Elbow 0-90 degree - 125mm

Our 125mm IL gas pipe connectors are made using the finest materials such as 316L-grade stainless st..

Our Price (ex VAT): £25.31 Inc VAT: £30.37

Gas Vent Terminal - 125mm

Must be used on all systems connected to a gas appliance..

Our Price (ex VAT): £25.11 Inc VAT: £30.13

Draughthood Connector – 150mm

Our 150mm draughthood connectors are made from high-quality materials such as aluminium and zalutite..

Our Price (ex VAT): £11.60 Inc VAT: £13.92

Support Plate - 125mm

Used in conjunction with the firestop plate, gives support to the flue system...

Our Price (ex VAT): £23.30 Inc VAT: £27.96