Why is My Boiler Leaking Water? 5 Possible Causes


You hardly expect your boiler to start leaking any time soon as you believe a boiler has a 10-to-20-year life expectancy. So, it wouldn’t need to be repaired or changed in the near future. With this in mind, a boiler leaking water in the middle of a typical day can seem like a disaster. However, when you’re faced with a boiler leaking water, don’t feel like you’re in a living hell, where you have to cut on expenses, save plenty of money, and stick to a strict budget just to buy a new boiler. Before you get all stressed out, make sure you check your boiler thoroughly since the bottleneck you’re facing might be handled more straightforwardly than you think. So, to start, focus on the reason behind the leakage. Here is a list of reasons which is likely to be the cause of your boiler leaking water:

boiler heating system

1. boiler leaking water Issues related to pressure

When your boiler is leaking water, one of the things you should check is where the leaking is from. Boilers are equipped with a pressure outlet pipe which from time to time might cause dripping. In such cases, water dripping to some extent is absolutely normal and even urgent for the boiler’s safety. So, whenever the pressure outlet pipe is the reason behind the leaking simply get past it because it’s not a big deal by any stretch of the imagination. However, suppose the water leaking from boiler is much more than a reasonable amount; in that case, the pressure is increasingly high, and the pipe is overworking to bring the pressure down. What you have to do is to ensure you reduce the pressure yourself by bleeding your radiators which means by releasing the air stuck in them.

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2. Loose joints can cause a stern boiler leakage

Another thing you should check the minute your boiler is leaking water, is to find out whether the joints are loose or tight. Because of the fact that when the water gets hot, the pipes contract, and when it gets cold, they expand, the joints might actually loosen up as time goes by. And when they do, they might be the source of the water leaking from boiler. Consequently, tightening them can easily fix your problem. A boiler water pipe leaking can be a tough leakage; nonetheless, you won’t have to install another boiler, which is a good sign. Luckily, all you have to do is to tighten the joints. Additionally, keep in mind that if you installed your boiler not long ago, the pipes might haven’t been joined together correctly. Loose pipes after installation might also bring about boiler water leaking.

loose joints can cause a stern boiler leakage proplumber.ukproplumber-uk

3. Corroded pipes

Another answer to the question of “Why does my boiler leak water?”, might lie in corroded pipes in your boiler. Of course, this factor might only be related to your boiler if you’ve had it for over ten years or so. The pipes wear out naturally over time, and the next thing you know is that your boiler starts leaking water. When your boiler is leaking water because of corrosion, you first have to ensure whether the corrosion has occurred in just a single pipe or most of them. If only one of the pipes has become worn, you can quickly exchange it with a new one and move on with it. On the other hand, if the corrosion has spread to other parts of the pipes, then sadly, you do have to keep on a strict budget to buy a new boiler, but don’t panic, this way you’ll be able to save up on the gas bill. 

4. Boiler pump hasn’t been accurately sealed

A boiler pump, also called the central heating pump, could account for water leaking from boiler. This pump circulates the hot water through the pipes and then navigates it through the radiators, showers and taps. Along with water leakage, cold water, and cold radiators could also indicate that your boiler pump hasn’t been accurately sealed. On occasions like this, you should call an expert to either change your boiler pump, or reseal it. It would be much better If you don’t take action yourself and immediately call a professional since you might end up causing more damage to the system.

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5. Boiler heat exchanger dysfunction

The heat exchanger is a vital part of the boiler that allows transferring heat from gas into water. This item is the most expensive part of the boiler. So, any sort of dysfunction in the heat exchanger, namely leaking, is bad news. There are two factors that have to be considered regarding this kind of leakage. Firstly, you don’t have the expertise to determine if the water leaking from the boiler is rooted in a heat exchanger-related issue, so you need to ask an expert plumber’s help. Secondly, any sort of repair would cost you a fortune when it comes to the heat exchanger; hence, you better give up, accept your fate, and buy a new boiler.

boiler heat exchanger dysfunction proplumber.uk

To Sum up, a boiler leaking water might occur due to a myriad of reasons. It could be because of a pressure-related issue, joints that have loosened up, corrosion, an unsealed boiler pump, or even a problem with the heat exchanger. In each of the scenarios, contacting a skillful plumber is the correct choice to make. Surely, there are a few things you can do while waiting for the plumber to arrive. Prior to conducting any action turn off the water and the boiler’s electric supply. After that, switch off the heating. And at last, dry out any water on the floor. At this moment, the plumber has most probably arrived and will find a solution for your boiler leaking water. Furthermore, as you know and you’ve definitely heard many times, “prevention is better than cure”. Meaning that it’s easier to stop something from happening in the first place than to repair the damage after it has taken place. The same is true for your boiler. Therefore, consider having a boiler leaking service once a year to put your mind at ease and ensure the safety of your boiler. This way, you wouldn’t have to worry about water leaking from boiler.

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