
Unvented Cylinder Services Across London
TTPP provides professional unvented hot water cylinder services across London, including fault-finding, repairs, servicing and component replacement. From poor hot water performance and pressure problems to leaking safety valves and expansion issues, our qualified engineers can diagnose faults and help keep your unvented hot water system operating safely and correctly.
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Fully Insured • Unvented Cylinder Services Across London • Free Estimates
Common Unvented Cylinder Problems
Unvented hot water cylinders rely on a number of safety controls, valves and components to operate correctly. Problems can affect hot water temperature, pressure or system operation, and faults involving safety devices should be investigated properly by a suitably qualified engineer.
No Hot water
If the cylinder is not producing hot water, we can investigate the immersion heaters, controls and other components to identify the fault.
Poor Pressure
Reduced hot water pressure or flow can indicate problems with the inlet controls, valves or water supply that require investigation.
Water discharge
Water continuously passing through the tundish can indicate a problem with a safety valve, expansion control or another system component.
Expansion Faults
Problems with the expansion vessel or internal expansion arrangement can cause pressure issues and discharge from the safety valves.
Faulty Valves
Pressure reducing, relief and other control valves can develop faults that affect the safe and correct operation of the cylinder.
Immersion Faults
Failed immersion heaters, thermostats or electrical controls can result in reduced or completely unavailable hot water.
How We Diagnose Cylinder Faults
Unvented cylinder faults can involve several different components, so accurate diagnosis is important. We check the relevant valves, controls, expansion arrangements, immersion heaters and safety devices to identify the cause of the problem before recommending the appropriate repair or replacement component.
Unvented Cylinder Repairs & Servicing
We carry out professional repairs and servicing for unvented hot water cylinders, including diagnosis of pressure, expansion, valve and heating faults. Safety components are checked carefully and any defective parts identified before the appropriate repair is carried out.
Valves & controls
Diagnosis and replacement of faulty inlet controls, safety valves and other components that regulate pressure and cylinder operation.
Expansion Systems
Checking and correcting faults with expansion vessels or other expansion arrangements that can cause pressure and discharge problems.
Heating Components
Fault-finding and replacement of immersion heaters, thermostats and associated controls where hot water performance is affected.
Unvented Cylinder Servicing
Regular servicing helps ensure the safety controls and components of an unvented cylinder continue to operate correctly. We inspect the cylinder and associated controls, check the expansion arrangement and safety devices, and identify any signs of wear, faults or maintenance that may require attention.
Repair Or Replace Cylinder Components?
Many unvented cylinder faults can be resolved by replacing individual components rather than the complete cylinder. Faulty valves, expansion vessels, immersion heaters and controls can often be replaced separately. We’ll assess the condition of the system, identify the cause of the fault and explain the most appropriate repair before recommending more extensive work.
Why Choose TTPP for Unvented Cylinders?
Qualified Engineers
Unvented hot water systems are also subject to specific safety requirements under Building Regulations.
Expert Fault Finding
We systematically check the cylinder, valves, controls and expansion components to identify the underlying cause of the problem.
Clear Honest Advice
We explain the fault and repair options clearly, recommending replacement components only where they are required.
Unvented Cylinder Services Across London
TTPP provides professional unvented cylinder services across London for homeowners, landlords and businesses. From hot water and pressure problems to leaking safety valves, expansion faults and failed immersion heaters, our qualified engineers can diagnose the problem and recommend the appropriate repair or servicing.
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Trusted Plumbing & Heating Engineers in London
Customers across London choose TTPP for professional plumbing, heating and hot water services. From fault-finding and repairs to servicing and replacement work, we provide clear advice, careful diagnosis and practical solutions for homeowners, landlords and businesses.

Mark De Souza
BOILER REPAIR

“Today, Kevin helped out with my old boiler. I recognised his commitment to the problem and am very grateful. I do shift work, and he was able to fit in with the situation.”

Lucy P
CYLINDER REPAIR

“I highly recommend Kevin. He did the job at very short notice, kept me updated and provided an excellent service.

H Shaw
BOILER REPLACEMENT

“ regularly use Kevin at TTPP to perform my boiler service, gas safety checks and ad hoc boiler maintenance. I have found him pleasant & reliable, and wouldn’t hesitate to use him again.”
Having trouble With Your Hot Water Cylinder?
Whether you have no hot water, pressure problems, water passing through the tundish or another unvented cylinder fault, contact TTPP today. We’ll assess the system, identify the cause and explain the most appropriate repair or servicing required.
