Unvented cylinder servicing
Unvented cylinder servicing checks the cylinder and its safety controls using the manufacturer requirements and an appropriately qualified engineer.

Unvented cylinder servicing: matching the fault to the installed system
Assessing the fault
Provide the make, model, service history and any unusual discharge, noise or temperature change.
The work to discuss
Identify the cylinder or hot water arrangement and the relevant controls before deciding the work required. Unvented systems need an appropriately qualified engineer; gas and electrical work must be handled by the relevant competent tradesperson.
Details for your plumbing enquiry
Provide the system label or model, whether it is vented or unvented, and the observed fault. Mention leaks, unusual discharge, temperature changes and previous service records.
Unvented cylinder servicing: questions and answers
Who should work on an unvented cylinder?
Use an engineer with the appropriate unvented hot water competence. Ask about relevant qualifications and the service scope when booking.
What details are needed for unvented cylinder servicing?
Provide the system label or model, whether it is vented or unvented, and the observed fault. Mention leaks, unusual discharge, temperature changes and previous service records. Provide the make, model, service history and any unusual discharge, noise or temperature change.
What affects the quotation for unvented cylinder servicing?
The quotation takes account of attendance, the fault, access, labour and required parts. Confirm any opening-up, reinstatement or follow-up visit separately. Agree the proposed scope before work proceeds.
Unvented cylinder servicing across the UK
Choose the property area and give the full postcode when you enquire. Availability is checked for the address and work required.
5920 areas. All links are available below.
East Midlands 416 areas
East of England 534 areas
London 826 areas
North East 185 areas
North West 355 areas
Northern Ireland 527 areas
Scotland 656 areas
South East 675 areas
South West 503 areas
Wales 579 areas
West Midlands 275 areas
Yorkshire and The Humber 389 areas
Talk through the plumbing problem
Tell us the affected fitting, whether water is still escaping and how to reach the property. Call 0800 111 6480 to discuss attendance and the work required.