Hydronic Heating Leaks What Are Its Possible Causes

12 Oct by Will Kruse

Hydronic Heating Leaks What Are Its Possible Causes

Hydronic heating, also called hot water radiant heat, heats and distributes hot fluids through a piping system to various regions of your home. You may not have paid attention to it because you are accustomed to the system operating automatically.

Due to the fixed nature of modern radiant floor heating systems, they are built to resist leaks. However, leaks are inevitable because these can break down just like any other type, so it’s crucial to recognize the early warning signs so that you can get repairs immediately.

Here are the possible causes of your hydronic heating leaks that you should be aware of:

1. A Problem with Pressure

Your hydronic system’s surrounding water is most likely the cause of this. There is a distinct output line for releasing extra pressure in each boiler.

The output pipe is constructed without sealed connectors to allow the pressure to escape. The water occasionally drips as a result of this. There is no need to be concerned if the pressure output pipe leaks water very slightly.

The pressure within the boiler may be too high if you notice a sizable amount of water dripping from the pressure output pipe. Check to see if the hydronic heating system’s gauge needle is pointing in the direction of the green or the red. Your boiler will need to be bled to lower the pressure if it is in the red.

2. Aging

Hydronic heating systems can deteriorate over time, much like any other plumbing system. A pipe or connection that has finally failed might cause a leak if your system was installed many years ago. In this situation, you ought to have the system inspected by professionals and then replace it after the leak has been patched.

3. Poorly Installed

Unsuitable installation is invariably to blame. The system may have been improperly installed or include a defective component if there have been no freezes and the system is brand new. The fact that it is unclear whether the questionable work was restricted to the area of the leak or if the entire system is now suspect makes it one of the most complex problems to tackle

4. Loose Joints

Loose joints in the piping system are a common cause of leaks in a hydronic heating system. Over time, these leaks can cause extensive damage to the design and may even necessitate replacement. If you notice any leaks in your system, it is essential to have them repaired as soon as possible to avoid further damage.

5. Broken Seals or Body

Over time, your boiler will regularly constrict and expand. Leaks may emerge from the damage and fissures caused by this. It’s time to replace it if you live in an old house and suspect a body crack.

Seals that are broken may also be to blame for a boiler leak. After years of use, rubber seals either become rigid or fall away.


Whether the causes of a leaky boiler are straightforward or more complicated, everything calls for an immediate fix. All boilers eventually degrade, requiring regular maintenance to maintain the specified lifespan.

Are you searching for hydronic heater repair? L.J. Kruse Co. is here to help you! We are a professional team that will respond to your hydronic heating needs and protect your home. Contact us today to learn more about our services!

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