There is no fixed answer to how long a hot water cylinder lasts, because it depends on how it was made, fitted and looked after. Some cylinders give many years of service, while others develop problems sooner. Knowing what affects lifespan, and the signs of wear, can help you plan ahead.
What Affects a Cylinder’s Lifespan
The material makes a difference. Many cylinders are made from copper, while many modern unvented cylinders use stainless steel. Each material behaves differently over time, and build quality varies between makes and models.
Installation quality matters too. A cylinder that was fitted well, with suitable pipework and the right controls, is under less strain. Poor connections or unsuitable parts can lead to problems earlier.
Water conditions also play a part. In general, hard water can lead to limescale building up inside a cylinder and on heating parts, while some water conditions can be associated with corrosion. How much hot water a household uses each day can affect wear as well.
Why Maintenance Matters
Regular care can help a cylinder last longer. Manufacturers usually recommend that unvented cylinders are serviced regularly by a competent person. This allows the safety devices and other parts to be checked, as set out in the maker’s instructions.
Vented cylinders are simpler, but the loft cistern, valves and pipework still benefit from being checked from time to time. Small problems are often easier to deal with when they are spotted early.
Corrosion is one of the main reasons a cylinder reaches the end of its life. Once the body of a cylinder starts to corrode or weep, a repair may not be practical.
Warning Signs to Look Out For
Some signs suggest a cylinder may be struggling. Common ones include:
- water leaking or damp around the base or joints
- discoloured or rusty looking hot water
- rumbling, banging or hissing noises
- hot water running out faster than before, or not getting hot enough
These signs do not always mean the cylinder needs replacing. A fault with a valve, a control or another part may be the cause. Water around an unvented cylinder, or from its discharge pipe, should be looked at by an appropriately competent professional, and you should not adjust its safety parts yourself. If there is water near electrics, keep clear and get help.
When Replacement May Be the Better Option
Replacement may be worth considering if the cylinder itself is leaking or corroded, if faults keep coming back, or if it no longer meets your household’s needs. A change of heating system can also be a good time to review the cylinder.
For more on what a new cylinder involves, see our page about getting a hot water cylinder replaced in Swindon. Some problems can be repaired instead, so it helps to have the cylinder looked at first.
If you have noticed any of these signs, Emergency Plumber Swindon is happy to talk it through and take a look at the plumbing side. Call us on 01793 569521.