Why plumbers should use the NEBO Assist Air for recharging expansion vessels
Plumbers constantly seek efficient, reliable tools to simplify their work and improve service quality. One such tool that offers significant benefits in heating system maintenance is the NEBO Assist Air. This powerful, portable air compressor is not just for inflating tyres; it can also be a game-changer for recharging expansion vessels in heating systems, which often use Schrader (tyre) valves for re-pressurisation. Let’s explore why this tool should be in every plumber’s kit.
Understanding expansion vessels and their maintenance
Expansion vessels are essential components of pressurised heating systems, including combination boilers and unvented hot water cylinders. These vessels prevent excessive pressure build-up by accommodating water expansion as it heats up. Inside the vessel, a rubber diaphragm separates water from an air pocket, which acts as a cushion to regulate pressure.
Over time, the air charge within the expansion vessel can deplete, leading to pressure issues such as:
- Boiler pressure dropping frequently
- Water leaking from the pressure relief valve (PRV)
- Heating system inefficiency or failure
To restore proper function, plumbers must recharge the vessel by adding air through its Schrader valve, typically using a hand pump or a bulky compressor. However, the NEBO Assist Air presents a more efficient, portable and reliable alternative.
Why choose the NEBO Assist Air?
1. Compact and portable for easy on-site use
Traditional compressors are often large, heavy and inconvenient for plumbers working in tight spaces or domestic properties. The NEBO Assist Air is lightweight and compact, making it easy to carry into lofts, cupboards and boiler rooms. Its portability ensures you can quickly access and recharge an expansion vessel without hassle.
2. Precise pressure control
When recharging an expansion vessel, precision is crucial. Over-pressurising can damage the diaphragm, while under-pressurising can lead to system failures. The NEBO Assist Air features an adjustable digital pressure gauge, allowing plumbers to set the exact PSI required (usually between 0.8 and 1.5 bar for domestic systems). This ensures optimal system performance and longevity.
3. Speed and efficiency
Using a manual pump can be time-consuming and physically exhausting, particularly when dealing with multiple jobs in a day. The NEBO Assist Air significantly speeds up the process, enabling plumbers to recharge an expansion vessel in seconds rather than minutes. This efficiency saves time on-site and allows professionals to serve more customers in a day.
4. Battery-powered convenience
Unlike traditional air compressors that require a power outlet, the NEBO Assist Air is battery-powered, eliminating the need for extension leads or power sources. This makes it ideal for use in properties where power access may be limited or in tight spaces where manoeuvring a plug-in compressor is impractical.
5. Multi-purpose use beyond expansion vessels
While perfect for recharging expansion vessels, the NEBO Assist Air can also serve other functions, such as:
- Inflating radiators fitted with pressure valves
- Checking and topping up air in vehicle and work van tyres
- Assisting with pressure testing small systems
Having a versatile tool like the NEBO Assist Air reduces the need to carry multiple devices, making a plumber’s toolkit more efficient and organised.
How to recharge an expansion vessel using the NEBO Assist Air
Using the NEBO Assist Air to recharge an expansion vessel is simple and efficient. Follow these steps:
- Turn off the boiler: Before working on the expansion vessel, switch off the boiler and allow it to cool down.
- Drain excess water: Connect a hose to the system’s drain valve and remove any excess water to relieve pressure.
- Locate the Schrader valve: Most expansion vessels have a Schrader valve, similar to a tyre valve, usually on the top or side.
- Attach the NEBO Assist Air: Securely connect the compressor’s hose to the Schrader valve.
- Set the desired pressure: Check the manufacturer’s specifications and set the NEBO Assist Air to the recommended PSI (typically 0.8-1.5 bar for domestic systems).
- Inflate and monitor: Activate the compressor, monitoring the pressure gauge to ensure accurate inflation.
- Re-pressurise the heating system: Once the expansion vessel is properly charged, refill the heating system to its correct pressure level (usually around 1-1.5 bar).
- Test the system: Switch the boiler back on and observe its pressure levels and performance to ensure proper function.
Luke the Plumber’s verdict:
“The NEBO Assist Air is a must-have tool for me. Its compact size, precise pressure control, battery-powered convenience and multi-functional use make it an invaluable addition to my daily toolkit. It’s also great to have in the van, should I get a flat tyre or battery when I’m needed out on the road for a job.”
