20/05/2026
Is your unvented hot water cylinder dripping or discharging water from the temperature/pressure relief valve?
Here are some common causes we come across:
- Expansion vessel has lost pressure or failed
- Cylinder temperature has exceeded 90°C
- Faulty zone valve or immersion heater thermostat letting by
✅ Possible solutions:
✔️ Recharge or replace the expansion vessel
✔️ Replace faulty zone valve or immersion heater thermostat
✔️ Replace the temperature/pressure relief valve if required
Regular servicing helps prevent costly breakdowns and keeps your hot water system running safely and efficiently.
Need help diagnosing an issue with your cylinder? Get in touch with our team today 📞🔥