Our Services
Unvented Hot Water
About This Service
Unvented Hot Water
Heatfire installs and services unvented hot water cylinders for domestic and light-commercial properties across Willenhall, Walsall and Wolverhampton. Our Unvented Registered engineers carry out full commissioning, annual safety inspections and routine maintenance so your system delivers reliable hot water at mains pressure. We combine 15 years’ practical experience with clear paperwork and service plans to keep your system compliant and working.
Our Process
How It Works
Site survey & recommendation
A qualified engineer surveys water supply, loft/plant-room space and heating interface, then recommends cylinder size, safety group and installation method tailored to your property.
Installation & commissioning
We install the cylinder, safety group, expansion vessel and isolation valves, then fully commission and test the system to Unvented Registered standards and supply paperwork.
Annual inspection & test
Each year we inspect the safety devices, check pressures and thermostats, carry out a discharge test where required, and record findings for your service history or warranty.
REVIEWS
What Our Customers Say
Google— Petronella Tomkinson
Google2026-03-10— Ifeoma Ogbonnaya
Google2026-01-13FAQ
Frequently Asked Questions
An unvented cylinder stores hot water at mains pressure so taps and showers run with high flow. Unlike vented systems, it has a sealed safety group (pressure relief valve and expansion vessel) and must be installed and serviced by an Unvented Registered engineer.
We recommend an annual inspection and test of all safety devices, pressures and controls. Regular servicing prevents nuisance discharges, identifies corroded components early and keeps the system compliant with manufacturer guidance.
Yes. Unvented cylinder installations are safety-critical and should be completed by Unvented Registered engineers. Heatfire engineers hold Unvented registration plus Gas Safe and OFTEC where fuel heating integration is needed.
Common signs include regular discharge from the safety valve, unexplained pressure loss, cold spots in the cylinder or visible leaks. If you notice any of these contact Heatfire promptly to avoid water damage or further issues.
Yes — many customers convert for better flow and to remove loft header tanks. A survey checks mains feed, loft access and heating interfaces; some properties require mains supply upgrades or a suitably sized cylinder location to meet regulations.
Book an unvented cylinder survey
Other Services