Unvented Cylinder Repairs in Kent
Specialist repairs for unvented hot water cylinders. G3 qualified engineer for safe, compliant repairs. I'm George — Gas Safe registered and based in Greenhithe, covering Dartford, Gravesend, Bexleyheath and all of North Kent.
Unvented Cylinder Repairs in Kent
Unvented hot water cylinders are brilliant for delivering mains-pressure hot water throughout your home. But when they go wrong, you need someone with the right qualifications to fix them safely.
I’m G3 qualified, which means I’m certified to work on unvented hot water systems. It’s a legal requirement – and a safety must.
Common Unvented Cylinder Problems
No hot water – Could be an immersion heater failure, thermostat issue, or problem with the heat source (boiler or solar).
Low water pressure – If your hot water pressure has dropped, it might be a failing pressure reducing valve or an issue with the expansion vessel.
Water too hot or not hot enough – Thermostat problems are common and usually straightforward to fix.
Tundish dripping – The tundish (the visible air gap near your cylinder) should only drip occasionally. Constant dripping usually means the temperature/pressure relief valve needs attention.
Rumbling or banging sounds – Often caused by limescale buildup on the heating elements, especially in hard water areas like Kent.
Leaking cylinder – Whether it’s a valve, fitting, or the cylinder body itself, I’ll diagnose the source and advise on repair or replacement.
Why G3 Qualification Matters
Unvented cylinders operate under mains pressure and can reach high temperatures. If the safety devices fail or are incorrectly installed, there’s a real risk of scalding or worse. The G3 qualification ensures I understand:
- How to safely isolate and discharge the system
- How to test and replace safety devices
- The regulations covering installation and maintenance
- How to commission the system correctly after work
Never let an unqualified person work on your unvented cylinder. It’s not worth the risk.
Brands I Work With
I repair all major brands of unvented cylinders including:
- Megaflo
- Range Tribune
- Heatrae Sadia
- Gledhill
- OSO
- Telford
Book Your Unvented Cylinder Repair
Got a problem with your unvented hot water cylinder? Book online at booking.thamesboilers.co.uk or call me on 01322 788418.
Related Services
While I'm there, I can also help with:
Unvented Cylinder Repairs By Area
I cover all of North Kent — pick your area below to see what I can do for you locally.
Unvented Cylinder Repairs FAQs
Why do I need a G3 qualified engineer?
Unvented hot water cylinders operate at mains pressure and have specific safety requirements. By law, only G3 qualified engineers can work on them. I hold the G3 qualification, so you can be confident the work is done safely and to standard.
What are common unvented cylinder problems?
Common issues include loss of hot water pressure, temperature/pressure relief valve discharging, expansion vessel failure, and thermostat problems. I've repaired hundreds of cylinders across all major brands.
Do you repair all cylinder brands?
Yes, I repair all major brands including Megaflo, Range Tribune, Heatrae Sadia, Gledhill, OSO, and more.
My relief valve keeps discharging water - is this normal?
No, this usually indicates a fault with the expansion vessel or pressure reducing valve. It needs investigating as it can waste water and indicate a safety issue. Give me a call and I'll take a look.
Local Heating Engineer You Can Trust
The booking link's below, or ring me if you'd rather chat first. I'll give you an honest timeframe and a fixed price.