Commercial Pressurisation Unit Repair

What this service covers

Commercial pressurisation unit repair is designed to get your building’s heating plant back to stable operation, with minimal disruption and clear documentation.

• Fault finding on the pressurisation unit, expansion vessel, pumps, sensors and controls
• Investigation of pressure loss, topping up issues, recurring alarms and lockouts
• Repair or replacement of common components (subject to suitability and availability)
• Safety checks around relief valves, isolation, and make-up arrangements
• Recommissioning and proving correct operating pressures and setpoints
• Written handover notes and recommendations to reduce repeat faults

When you may need a pressurisation unit repair

This service is most relevant for facilities teams, landlords, managing agents, and small commercial sites where heating reliability matters.

Common triggers include:

• Frequent low pressure alarms or boiler lockouts
• System pressure rising and discharging via the relief valve
• The unit running constantly, short cycling, or sounding unusually noisy
• Unexplained pressure drops, air in the system, or poor heat distribution
• A failed PPM check, compliance concern, or suspected component failure

How the repair is delivered

Work typically follows a straightforward, safety-first process:

1. Initial assessment and isolation of the plant as required
2. Diagnostic checks to confirm whether the issue is the unit, the expansion vessel, or the wider system
3. Repair or component change, then functional testing
4. Recommissioning: setting cold fill pressure, verifying controls, and confirming stable operation under load
5. Handover with clear notes on what was found, what was repaired, and what to monitor

If the root cause sits outside the pressurisation unit, you will be advised on the next steps before further work is carried out.

Aftercare, reporting, and planned maintenance

Once repaired, you can keep the system reliable with simple follow-up actions:

• Recommended monitoring checks for pressure stability and alarm history
• Advice on preventing repeat faults (for example, addressing leaks or recurring air ingress)
• Options to include the unit within a PPM schedule, with periodic testing and recommissioning checks
• Documentation suitable for site records and maintenance logs