Unvented Cylinder Service in Orpington

The trend for loft conversions and bathroom additions in Orpington has driven a surge in unvented cylinder installations. Removing the loft tank frees up space for the conversion, and the mains-pressure hot water provides the powerful shower performance that modern en-suites demand.

However, many homeowners are not aware that these systems require annual servicing. Unlike a traditional vented cylinder, an unvented system stores hot water at mains pressure and relies on multiple safety devices to manage temperature and pressure. If these devices are not tested regularly, they may fail to operate when needed, potentially leading to water damage or scalding risks.

The investment in having your unvented cylinder serviced annually is modest compared to the cost of water damage to a newly renovated loft conversion or bathroom.

• Temperature and pressure relief valve (T&P valve) manual test
• Expansion vessel pre-charge pressure check
• Tundish and discharge pipework inspection
• Immersion thermostat and high-limit thermostat test
• Pressure-reducing valve and check valve inspection
• Visual inspection for leaks and corrosion
• Written service report

Our G3-qualified engineers service unvented cylinders from all major manufacturers:

• Megaflo (Heatrae Sadia) — the most common brand in renovated Orpington homes
• Gledhill — including Stainless Lite and PulsaCoil models
• Worcester Bosch — Greenstore range
• Telford — Tempest cylinders
• Range Tribune, Joule, and OSO

Whatever brand was fitted during your renovation, we have the experience and qualification to service it.

Annual servicing starts from around £120. This covers the full safety device inspection and written report. Repairs identified during the service, such as valve replacement or expansion vessel re-pressurisation, are quoted separately before any work proceeds.

We service unvented cylinders across Orpington, Petts Wood, Chelsfield, Farnborough, Locksbottom, Green Street Green, and Crofton.