A boiler is a vital part of a home’s heating system. It heats water to provide warmth throughout your home during cold winters. However, it can be worrying to find that your boiler is leaking. When a boiler leaks, it is a sign that there is a problem that needs urgent attention. 

If you’ve been wondering, “Why is my boiler leaking?”, Ravinia Plumbing, Sewer, Heating & Electric explains the common causes of boiler leaks and what may be needed to fix them. 

What Can Cause a Boiler to Leak?


A leaking boiler can be a result of corrosion in the tank or pipes that carry water around the boiler. Over time, the metal parts of a boiler system degrade due to constant exposure to water, and this can result in holes or cracks forming. If this is the case, then it is likely that the boiler will need to be replaced as repairing corroded parts may not be possible.

High Pressure

Boilers generate a significant amount of pressure, and if the boiler’s pressure is too high, it can result in leaks from various points. A common cause of high boiler pressure is an issue with the pressure relief valve. If the pressure relief valve is not working correctly, then the boiler will attempt to relieve the pressure elsewhere, leading to leaks.

Normally, your boiler will expel a small amount of water through the outlet pipe that is designed to release pressure – so a small bit of leaking water here is nothing to worry about. However, if you notice a large volume of water coming from the outlet pipe, it’s a sign of high pressure within your boiler. 

Take a look at the boiler’s pressure gauge – if the needle points in the high pressure zone, it’s time to call in a professional to bleed your boiler or to assess issues with the pressure relief valve.

Damaged Seals

Another reason for a leaking boiler could be worn-out seals. Over time, seals will naturally degrade due to wear and tear, leading to pressure points and eventually leaks. Additionally, it may not be easy to identify the exact location of the seal, which makes it harder to fix the issue. To resolve this problem, you will need to contact a boiler repair technician who will identify and replace the damaged seals.

Loose Connections

A boiler system is an intricate network of pipes, valves, and other components, and sometimes loose connections or fittings can cause leaks. The water pressure within a boiler system can cause parts to wiggle loose. 

This can lead to water escaping through a broken or loose connection or fitting. It is critical to keep the connections in perfect shape, and if any are damaged, have them repaired or replaced to prevent further leaks.

Preventing Damage from a Leaking Boiler

As a homeowner, it’s important to keep an eye on your boiler and its functionality. One unfortunate issue that may occur is noticing your boiler is leaking. This can cause significant damage and poses safety risks, so it’s crucial to take action immediately. 

Here are some steps you should take to prevent damage when your boiler is leaking:

Call Ravinia Plumbing for Professional Boiler Repair Services

A leaking boiler is not something to be taken lightly. It can lead to significant water damage to your home, increase your energy bills, and pose a safety threat. If your boiler is leaking, it’s crucial to tackle the issue head-on. Remember to turn off the power and water supply, identify the source of the leak, then repair or replace the damaged components.

At Ravinia Plumbing, we understand that boiler problems can be frustrating and inconvenient. That’s why we offer a full range of plumbing and boiler repair services in the Chicagoland area to ensure your boiler is always in pristine working condition. Contact our team today to schedule your boiler repair appointment in Chicago’s North Shore and Chicago’s Northwest suburbs.