Compressed air hoses and fittings for workshop use
The compressed air system is one of the most used services in any HGV workshop, powering impact wrenches, ratchets, tyre inflators, and air chisels. The hose and coupling system needs to be appropriate for the tools being used: a small-bore hose restricts airflow to high-consumption tools such as impact wrenches, reducing their output and making longer jobs slower.
For impact wrench use, a 3/8-inch internal bore hose maintains adequate airflow at typical workshop compressor pressures. For tyre inflation and lighter tools, a standard 1/4-inch bore hose is sufficient. Hose length affects pressure drop: longer runs in large workshops benefit from 3/8-inch bore hoses to maintain tool performance at the end of the run.
Coupling standardisation matters in a workshop with multiple technicians. Euro-profile couplings (also called R-profile) are the most common standard in UK commercial vehicle workshops. BSP (British Standard Pipe) couplings are used for connecting to compressor outlets and fixed connections. If you're fitting out a new workshop air system or replacing worn couplings and hoses, call us on 01527 598 000 and we can advise on the correct specification.
Frequently Asked Questions
What compressed air hose do I need for an impact wrench?
For impact wrench use, use a minimum 3/8-inch internal bore hose. A 1/4-inch bore hose restricts airflow to high-consumption tools and reduces their output torque. For a busy HGV workshop where impact wrenches are in constant use, a 3/8-inch bore hose with euro-profile couplings is the correct specification. Keep hose length as short as practical to minimise pressure drop.
What is the difference between BSP and euro-profile air couplings?
BSP (British Standard Pipe) couplings are the standard for connecting air equipment to the compressor outlet and fixed workshop supply points. Euro-profile (R-profile) couplings are the most common tool connection standard in UK workshops. The two types are not interchangeable. Most workshop hose assemblies use BSP at the supply end and euro-profile at the tool end.
How do I check if an air hose needs replacing?
Inspect the hose along its full length for cracks, bulges, or abrasion damage to the outer sheath. Check the end fittings for corrosion and secure attachment to the hose body. A hose that whistles when under pressure has a leak, and the fitting area is the most common location. Damaged air hoses should be replaced rather than repaired: a hose failure under pressure is a safety hazard.
Do you stock hose reels for workshop use?
Yes. We stock retractable hose reels in several hose lengths and bore sizes for fixed workshop installation. A hose reel keeps the air supply off the floor, reduces trip hazards, and extends hose life by preventing kinks and drive-over damage. Wall-mounted and ceiling-mounted mounting options are available depending on the workshop layout.
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