17/06/2026
The most common reasons boilers, pipework and circuits fail when a property is under pressure
Pressure in heating systems is not just about keeping things warm. When it is off balance, it can cause all sorts of headaches, from leaks to system shutdowns. Understanding why failures happen under pressure helps you avoid costly repairs and cold nights.
Here is what we see most often:
• Faulty pressure relief valves that do not release excess pressure
• Corroded or damaged pipework caused by trapped air or water quality issues
• Expansion vessel failures leading to fluctuating pressure levels
• Circuit blockages from sludge and debris buildup
• Incorrect system filling or topping up without the right checks
For example, a recent call-out involved a commercial property with a leaking pipe caused by air trapped in the system, increasing pressure and stressing joints. Our engineers flushed the system, replaced the faulty valve, and restored balance.
Regular maintenance and prompt attention to pressure issues can keep your heating system safe and reliable. Do not wait for a breakdown to call in the experts.
If you want peace of mind with your boiler and heating circuits, get in touch with Twickenham Services. Our skilled team is on call 24/7 to keep your property running smoothly.