Trust the Experts at Master Gas London for Your Unvented Cylinder Service Needs…
Book Your Unvented Cylinder Service for Just £144
Fast and Easy Online Booking
We Service all Types and Brands of Cylinders
Fixed Pricing so no Surprises
Book your Cylinder Service in 3 simple steps...

1.
Fill out our short service booking form

2.
Choose a date that suits you

3.
Once confirmed, we will attend to service your Cylinder
What's Included in the Unvented Cylinder Service?
During our unvented cylinder service, we perform a range of checks and tests to ensure your cylinder is operating safely and efficiently. Here’s what’s included in our comprehensive cylinder service:
Visual Inspection
Our engineers will begin the unvented cylinder service by performing a comprehensive visual inspection. They will carefully examine all components, pipework, and connections to detect any indications of damage, leaks, or corrosion.
Pressure and Expansion Relief Valve Testing
The pressure relief valve and expansion relief valve are crucial safety components of an unvented cylinder system. Our team will test these valves to ensure they are functioning correctly and safely
Temperature and Pressure Testing
We will test the temperature and pressure settings of your unvented cylinder, ensuring they are within the manufacturer’s recommended range.
Check Safety Devices
We will test and verify the operation of all safety devices, including temperature and pressure relief valves, pressure reducing valves, and thermostats. This ensures that your unvented cylinder is equipped with the necessary fail-safe mechanisms.
Expansion Vessel Check
We check and pressurise any internal or external expansion vessels.
Performance Evaluation
To ensure your unvented cylinder is operating optimally, we will evaluate its performance, including assessing hot water flow rates and the overall efficiency of the system.
Service Certificate
We issue a service certificate upon completion of the service.
By choosing Master Gas London for your unvented cylinder service needs, you can rest assured that your cylinder is in safe hands…

Unvented Cylinder Service + Gas Safety £194
Ensure the safety of your home. Get peace of mind with our Unvented Cylinder Service and Gas Safety Certificate combo. We'll take care of everything in one appointment for just £194
We Service all Brands and Types of Unvented Cylinders
At Master Gas London, we’re proud to service all brands and types of unvented cylinders. Our expert G3 qualified engineers are fully trained and experienced to work on any make or model, including popular brands like MegaFlo, Gledhill and Kingspan. As an approved service provider for these leading manufacturers, you can trust that we have the knowledge and expertise to keep your unvented cylinder running smoothly. Contact us today to schedule your appointment and experience the Master Gas London difference.

Smart Thermostat Deals
Save money on heating and hot water with our Smart Thermostat Combo. Get a smart control installed during your unvented cylinder service or repair visit by our qualified engineers. Control your heating and hot water from anywhere with your smartphone or tablet.
We cover London, Essex and Hertfordshire for Servicing
- £144 Fixed Fee Cylinder Service
- Approved Service Provider
- 12 month Warranty on Workmanship
- Select a date that Suits you
- Book your Service Online

New Unented Cylinder Deals
Need a new unvented cylinder instead? Get a unvented cylinder replacement with installation included.
Pay by card or finance
Trust us for Quality Unvented Cylinder Servicing
At Master Gas London, we take pleasure in offering dependable, high-quality unvented cylinder servicing. Our team of skilled professionals always performs a full, thorough service to make sure your cylinder is operating at its peak efficiency. We go above and beyond to make sure that your unvented cylinder is operating effectively and safely, unlike many other firms who merely perform a visual check, which is not a service. With our comprehensive service, you can maximise your investment and feel secure knowing that your cylinder is in good hands.
Our Reputation Speaks for Itself...
FAQ'S
The lifespan of an unvented cylinder can vary depending on factors such as usage, maintenance, and water quality. On average, a well-maintained unvented cylinder can last for approximately 15 to 20 years.
Unvented cylinders are safe when installed and maintained correctly. They are designed with various safety features, such as pressure relief valves and expansion vessels, to ensure safe operation and prevent over-pressurisation.
It is recommended to have your unvented cylinder serviced annually. Regular servicing helps identify any potential issues, ensures efficient operation, and extends the lifespan of the system.
Unvented cylinders offer several benefits, including high water pressure for multiple outlets, fast and powerful hot water delivery, no need for a separate cold water storage tank, and flexibility in system design.
Unvented cylinders can be integrated with various heating systems, such as conventional boilers, heat pumps, or solar thermal systems. A qualified engineer can assess your current system and recommend the most suitable configuration.
If you observe a leak or suspect any problems with your unvented cylinder, it’s crucial to contact a qualified engineer immediately. They can assess the situation, identify the cause, and perform the necessary repairs.
In most cases, it is possible to switch from a vented system to an unvented cylinder. However, it requires a thorough assessment of your current plumbing setup and may involve modifications to accommodate the unvented system.
Regular maintenance, including flushing and cleaning the system, helps maintain good water quality. It’s also advisable to have your water tested periodically to ensure it meets the required standards and doesn’t contain any contaminants.