Unvented Hot Water Cylinder Repairs in Nottingham
Unvented (pressurised) hot water cylinders are sealed, high-pressure systems with safety controls that need to be working correctly. Gaswise UK carries out unvented hot water cylinder repairs across Nottingham — leaking valves, pressure problems and no-hot-water faults diagnosed and fixed. Call Melvin directly on 07747 145211 for a fixed quote.
Unvented Hot Water Cylinder Repairs
An unvented cylinder stores hot water under mains pressure, so it relies on safety controls — an expansion vessel, a temperature and pressure relief valve and an expansion relief valve — to work safely. When one of those fails you'll often see water dripping from the outside discharge pipe, pressure problems, or a loss of hot water. We diagnose the real fault, give you a fixed quote first, and carry out the repair so the cylinder is left safe and fully working. Common jobs include a valve that keeps dripping into the tundish, a waterlogged expansion vessel, or no hot water from a failed thermostat or immersion.
What we fix
- Diagnosis of unvented cylinder faults
- Leaking or discharging pressure and temperature relief valves
- Expansion vessel faults and re-pressurisation
- No hot water or low hot water diagnosis
- Thermostat and immersion heater faults
- Tundish and discharge pipe checks
- Safety controls checked after every repair
The problem: A Nottingham homeowner noticed water steadily dripping from the outside discharge pipe of their unvented cylinder.
What we did: We found the expansion vessel had lost its air charge, re-pressurised it and replaced the worn pressure relief valve, then checked the cylinder's safety controls were working correctly.
The result: Dripping stopped, system pressure stabilised and the cylinder certified safe.
Unvented Cylinder FAQs
Who should work on an unvented hot water cylinder?
Unvented cylinders must be worked on by a suitably qualified engineer, as they are sealed high-pressure systems. We carry out unvented cylinder repairs across Nottingham — call 07747 145211 to discuss your cylinder.
Why is water dripping from my cylinder's outside pipe?
That's the discharge from a relief valve, usually caused by a failed expansion vessel or a faulty pressure relief valve. It needs attention — call us and we'll diagnose and fix it.
How often should an unvented cylinder be serviced?
Once a year. An annual service keeps it safe and efficient and is often a condition of the manufacturer's warranty.
Is there a call-out charge?
No — there is no call-out charge. We give you a fixed quote before any work and you only pay if you go ahead.
Are you Gas Safe registered?
Yes. All work is carried out by Gas Safe registered engineer Melvin Parker (reg. 190680).
Covering Nottingham & Nottinghamshire
Local engineers across the region for fast, reliable response.
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