With energy prices remaining a critical consideration for manufacturers across East Anglia, facility managers are under constant pressure to optimise site efficiency. Yet, in many production plants across Cambridgeshire, Norfolk, and Suffolk, compressed air leaks are causing thousands of pounds to be quietly escaping into thin air every single month. The British Compressed Air Society (BCAS) notes that in the average plant around 25% of all compressed air generated is lost to leaks, poorly maintained systems can lose anywhere from 30% up to 80% of their air production.

Compressed air is often referred to as the “fourth utility” in manufacturing. It drives all sorts of industrial processes from automated assembly lines, to food production and packaging plants to precision engineering. However, unlike water or gas, a compressed air leak doesn’t leave a puddle or a strong smell. It is invisible, often goes unheard over background factory noise, and can be surprisingly expensive if it is not fixed.

The True Financial Impact of Small Leaks

It is easy to assume that a faint hiss near an airline coupling isn’t a pressing issue. However, when operating under standard system pressure (typically around 7 bar), even small holes or leaks can result in substantial waste. At 7 bar, a 3mm hole (roughly the size of a screw head) loses air at a rate of roughly 5.2 litres per second – equivalent to 11 CFM. That air has to be replaced to maintain pressure in the system and generating compressed air is energy-intensive. A standard industrial screw compressor requires approximately 0.18 kW to generate 1 CFM at 7 bar.

• Wasted Power Draw = 11 CFM x 0.18 kW/CFM = 1.98 kW

• 1.98 kW x 4,380 Annual Hours (based on 12 hours per day) = 8,672 kWh/year

• At a tariff of 20p/kWh that single 3mm leak would cost £1,734 per year in wasted electricity

In addition to direct energy waste, leaks force your air compressors to work significantly harder than necessary. This increased load accelerates mechanical wear, shortens service intervals and increases the risk of unplanned downtime.

Where Do Leaks Usually Occur?

While main distribution pipework can develop issues, the vast majority of leaks occur close to the point of use. Common culprits include:

• Worn or degraded flexible hoses and push-fit couplings.
• Faulty condensate drains stuck in an open or partially open position.
• Corroded pipe joints and loose flanged connections.
• Pressure regulators and shut-off valves with worn internal seals.
• Unused equipment left pressurized when production lines are idle.

Finding the Invisible: Acoustic Leak Detection

To find leaks and solve issues quickly without interrupting day-to-day operations, Cambs Compressors utilises state-of-the-art ultrasonic acoustic leak detection. Our technical engineers use directional ultrasonic equipment to detect the high-frequency sound waves generated by escaping air, even in noisy factory environments and on pipework installed high above the shop floor.

Plugging leaks is one of the fastest, most cost-effective ways to cut your compressed air system’s electricity usage and carbon footprint. In most cases, a professional leak detection survey and subsequent repair pay for themselves within weeks or months, rather than years.

Is your facility losing energy to silent air leaks?

The team at Cambs Compressors provides comprehensive compressed air audits, acoustic leak detection surveys, and turnkey pipework repairs across East Anglia. Contact our engineering team today on 0800 0029 601 or request a survey by emailing us: [email protected].