Rubber Vacuum Air Brake Servo Hose

SAEJ1402 & BSAU110 Fibre Braided Oil Resistant

RSH010-ASH#1

£5.71

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Silicone Hose UK

HolmeBank Business Park, Station Road
Unit 5
Mirfield WF14 8NA
Vereinigtes Königreich

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Opening hours

Monday	07:00 – 19:00
Tuesday	07:00 – 19:00
Wednesday	07:00 – 18:00
Thursday	07:00 – 18:00
Friday	07:00 – 17:00
Saturday	07:00 – 13:00
Sunday	Closed

Bank holidays may affect our opening hours and delivery times.

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Rubber Air Brake Hose is a heavy-duty, high-pressure hose specifically designed for use in commercial vehicle braking systems and pneumatic control lines. Constructed with a black smooth synthetic rubber inner tube, reinforced with high-tensile braided fibre, and finished with an ozone-resistant synthetic rubber outer cover, the hose delivers outstanding strength, flexibility, and durability. Conforming to SAEJ1402 and BSAU110 standards, it ensures safe and reliable performance in demanding braking applications. With an operating temperature range from -40°C to +93°C (short-term peaks up to +100°C), Rubber Air Brake Hose provides dependable service across a wide range of climates and working conditions.

Key Features:

Material: Black synthetic rubber inner layer with ozone-resistant synthetic rubber outer cover.
Reinforcement: High-tensile braided fibre for pressure resistance and stability.
Operating Temperature: -40°C to +93°C (peak +100°C).
Working Pressure: 16 bar across all sizes.
Burst Pressure: 47 bar (3:1 safety factor).
Internal Diameter Range: 9.5 mm to 12.5 mm.
Wall Thickness: 4.8 mm to 5.3 mm depending on size.
Bending Radius: 114 mm to 138 mm depending on diameter.
Standard: SAEJ1402 / BSAU110 compliant.

The robust synthetic rubber construction provides excellent resistance to ozone, weathering, and environmental ageing, ensuring a long service life in exposed conditions. The smooth bore supports consistent airflow for reliable braking performance, while the braided fibre reinforcement maintains structural integrity under high working pressures. Flexible yet tough, the hose is easy to install, route, and handle in demanding environments where safety and reliability are critical.

Applications include air brake systems on commercial vehicles, trailers, buses, and agricultural machinery, as well as pneumatic control lines requiring a strong, flexible, and weather-resistant hose. Rubber Air Brake Hose provides a dependable solution for heavy-duty air systems where consistent pressure handling and long-term durability are essential.

Specifications

Type: Servo Hose
Colour: Black
Standard: BSAU110
Working Pressure: 16bar
Bursting Pressure: 47bar
Coil Length: 50m

Size Guide

Inside Diametermm	Outside Diametermm	Wall Thicknessmm	Bending Radiusmm	Coil Weightkg
9.5	19	4.8	114	14
12.5	23	5.3	138	19

Measurements are nominal and may vary slightly.

How to measure ID

1

Measure the pipe, not the old hose

Heat and age make a used hose swell and go out of round. Take your reading across the metal outlet the hose slides onto — that measurement is your ID.

2

Use vernier calipers

Set the outer jaws across the widest point of the pipe. A tape measure round a curve reads low by a millimetre or two — enough to buy the wrong size.

3

Take three readings, keep the largest

Rotate 60° between each. If they disagree the pipe is oval; size to the biggest figure so the hose still seals.

4

Round to the nearest listed bore

Never go up: a bore wider than the fitting will not grip, whatever the hose is made of. If you land between listed sizes take the smaller bore, and secure it with a clip.

Order by ID, always. Every hose on this site is listed by internal diameter. OD is given for clearance only — it changes with wall thickness and ply count, so it is never the ordering size. On reducers, quote both ends, largest first.

Construction

Outer cover

Black synthetic rubber inner layer with ozone-resistant synthetic rubber outer cover

Reinforcement

High-tensile braided fibre

Pressure resistance and stability · -40°C to +93°C (peak +100°C) · 16 bar across all sizes · 47 bar (3:1 safety factor)

Conforms to SAEJ1402 / BSAU110.

2 bore sizes9.5mm to 12.5mm internal diameter

47 bar burst16 bar working on the smallest bore

BSAU110 built to standardthe standard this range is built to

Vacuum rated. Servo spec.

Built to BS AU 110 for vacuum and air brake servo lines.

INTERNAL DIAMETERS

9.5mm to 12.5mm

RATED

−40°C to +93°C

WORKING PRESSURE

16 bar across all sizes

BUILT TO

BS AU 110

SOLD BY

The metre

Specification at a glance

Across the whole 9.5mm–12.5mm range.

9.5mm –12.5mm Inside diameter

19mm –23mm Outside diameter

4.8mm –5.3mm Wall thickness

114mm –138mm Bending radius

16bar Working pressure

47bar Bursting pressure

Inside diameter (mm)	Outside diameter (mm)	Wall thickness (mm)	Working pressure (bar)	Bursting pressure (bar)	Bending radius (mm)	Coil weight (kg)	Coil length (m)
9.5	19	4.8	16	47	114	14	50
12.5	23	5.3	16	47	138	19	50

Show all 2 sizes → Show fewer

How it's built

Two layers, each doing one job.

Two layers, from the outside in: black synthetic rubber inner layer with ozone-resistant synthetic rubber outer cover and high-tensile braided fibre. Each one is doing a different job.

1

Outer cover

Black synthetic rubber inner layer with ozone-resistant synthetic rubber outer cover

2

Reinforcement

High-tensile braided fibre

Pressure resistance and stability-40°C to +93°C (peak +100°C)16 bar across all sizes47 bar (3:1 safety factor)

Product gallery

Frequently Asked Questions.

Answers to the questions we’re asked most about sizing, fitment and performance.

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What is it used for?

Vacuum lines feeding a brake servo, and pneumatic control lines in commercial vehicle braking systems. Both need a hose that will not collapse under negative pressure.

What size and length do I order?

Order by internal diameter, matched to the outside diameter of the pipe stub or spigot it slides over. Measure the pipe with vernier callipers rather than the old hose, which stretches in service and reads large. Available in internal diameters from 9.5mm to 13mm, lengths from 1 Metre to 50 Metres (Full Coil). Full coils work out considerably better value per metre than cut lengths.

What standard is it built to?

It is manufactured to BSAU110. Buying to a recognised standard matters here - it means the construction, pressure rating and performance have been benchmarked rather than simply described.

Can I use it for fuel or oil?

No - EPDM and general-purpose rubber have poor resistance to hydrocarbons and will soften, swell and eventually fail. For fuel and oil use our SAE J30 R6 rubber hose or a fluorosilicone-lined silicone hose.

Why can't I use ordinary rubber hose here?

Because a servo line runs under vacuum, not pressure. Ordinary hose without adequate wall reinforcement slowly draws shut, and a partially collapsed servo hose gives a hard pedal that comes and goes - a dangerous and very hard fault to diagnose.

How should it be secured?

Proper hose clips, one at each end, positioned squarely over the barb or spigot. Support long runs with rubber-lined P-clips so the hose cannot chafe against a bracket, panel or wiring loom, and keep it clear of exhaust components.