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Specialists in Electric Hot Water Cylinders

Annual Unvented Cylinder Servicing: What Should Be Included?

15 June 2023

Modern unvented cylinders are marvels of engineering. They are strong enough to contain considerable internal pressure while supplying perfectly heated water to every tap within your home. However, they do need a little help along the way.

Like all home appliances, unvented cylinders can suffer from wear and tear and will begin to break down over time. The key to keeping yours in good condition is to have it serviced, and maintained annually. However, what should such an service include?

What Should an Unvented Cylinder Annual Service Include?

It’s important to understand that your annual unvented cylinder service is more than just a visual check-up. A G3-certified technician will conduct an in-depth assessment of your cylinder’s health and performance to determine whether it is safe and operating correctly. The annual inspection should include the following:

Temperature Controls

The technician should check the cylinder’s temperature controls (thermostat and associated technology). Without an operational thermostat, it’s impossible to control the cylinder’s temperature, which is critically important. If you cannot set your temperature between 60 and 65 degrees C, you cannot prevent dangerous bacteria from thriving. If the temperature rises too high, it could scald you or a family member.

Pressure Controls and Relief Valves

The key to unvented cylinder performance is the ability to maintain internal pressure. That’s what allows you to enjoy mains pressure water at every tap in the home. However, that’s also a source of danger. Overpressure situations can be very dangerous, so unvented cylinders have both pressure controls and relief valves built into them. Your technician should check the controls and relief valves to make sure they are operable, not obstructed, and free of corrosion that might impede operations.

Key Safety Devices

All unvented cylinders sold and installed in the UK are required by law to have specific safety devices built into them. Your technician should inspect and test these features and ensure that they are operating properly. This includes the discharge pipe, line strainer, and pressure-reducing valve.

The Cylinder Body

Over time, the body of your cylinder may suffer damage. It’s important to spot potential problems before they become major issues. These can include rust spots, signs of leaks, or even bulges in the metal that might indicate an overpressure situation has occurred.

Is It Time to Replace Your Cylinder?

All cylinders will eventually need to be replaced. The average lifespan is about 10 years. If yours is close to that (or over that mark), it might be wise to consider replacing it.

Who to Call?

Given the importance of your annual inspection, it’s vital that you work with a trusted G3-certified plumber. The EasyFlow team specialises in installing, maintaining, servicing, and repairing unvented cylinders from today’s leading manufacturers. We offer annual service/maintenance agreements that will help keep your cylinder in great condition and operating efficiently, while providing you with the peace of mind you deserve.

Get in touch with us today to schedule your consultation or to learn more about our maintenance agreements. One of our specialists would be happy to discuss your needs. We can also offer replacement cylinders for customers whose existing ones are damaged or close to the end of their lifespan.


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