Water dripping from the pressure relief discharge pipe outside.

Safety: Hot water may discharge from the pipe; keep clear of the outlet.

• Check system pressure gauge: If pressure is above the recommended range, reduce it by bleeding a radiator (for sealed systems) or via drain point.
• Check filling loop: Ensure the filling loop valves are fully closed and the hose removed if required by local regulations.
• Expansion vessel check: A flat expansion vessel will cause pressure spikes. A professional can test and recharge or replace it.
• PRV replacement: Once a PRV has lifted repeatedly, it may continue to drip and should be replaced by a technician.