Unfortunately, hot water heaters can and do burst. An explosion can occur either from a build-up in pressure within the water tank or a gas explosion.
According to the Insurance Institute for Business & Home Safety, the average storage-type water heater only lasts about 10 years. By the 9-year mark, more than 40 percent have burst, and just 6 years after setting up your new model, there's still a 15 percent chance it will explode all over your basement.
A leaking water heater could be a sign of a major problem. The worst-case scenario could be an explosion if water is leaking due to the pressure being too high. For this reason, if you notice your water heater is leaking, you should call an emergency plumber right away.
Based on the manufacturer's suggested service life, the life expectancy of a water heater is about eight to 12 years. That varies with the location and design of the unit, quality of installation, maintenance schedule and water quality.
When your water heater is leaking, you can usually take a shower, but it varies depending on the amount of the leak. Most water heater leaks at the drain valve, T&P valve, or delivery pipes, allowing only a tiny quantity of water to escape. If the leak is slight, you can take a shower before repairing it.
Banging/Rumbling: It is fairly common for water heaters to make a banging or rumbling noise when there is excess sediment in the tank (this is assuming you do not have a tankless system.) When this sediment interacts with the heating elements, it creates those little mini-explosions you are hearing.
Popping Sounds
One of the most common sounds a water heater can make is popping. When that happens, it's usually an indication that your water heater has an excess of mineral deposits and sediment at the bottom. This is especially problematic in areas that have hard water.
The short answer is: YES. Water heaters can definitely cause a fire. But this doesn't mean that water heaters are inherently dangerous; it highlights that improper use and neglect of such systems could lead to more significant problems down the road.
The sound: screaming or screeching
If your water heater is making a screaming sound while in use, the problem likely lies in the check valves in the water lines. When check valves cannot fully open, the water is forced to squeeze through, building pressure and causing a high-pitched noise.
If you experience a leaking water heater, it is recommended to turn off the water to your tank. Your water heater tank should have a dedicated shutoff valve on the cold inlet pipes. If this is a gate-style valve (a wheel that turns), turn the valve clockwise as far as you can.
Your Hot Water Tank Should Be Replaced Every 8-12 Years
The average lifespan of a hot water tank is between 8-12 years if it's high-quality, was properly installed, and has been properly taken care of since installation.
Crackling/Hissing: Crackling and hissing sounds are most common in electricity-powered water heaters. It is normal for these noises to show up once in awhile in electric heaters, so if your system occasionally releases a crackling sound, it probably isn't a big deal.
A water heater isn't a silent appliance. Some water heater noise is natural and expected. If that noise starts to disturb your day-to-day life, however, then it's a bad sign you should address. Banging, popping, or cracking sounds inside your heater's tank are a sign of mineral build-up.
Dirt and Dust
Older water heaters can accumulate dust, dirt, and grime. If dust or debris contacts a warm part of the machine, you may notice a burning smell. This is usually an easy fix. Shut down your water heater if it's too hot to the touch.
Home furnaces and water heaters are a major source of carbon monoxide poisoning, usually from poorly vented fuel sources or leaking vent pipes. Ideally, you should have your furnace and water heater inspected by a professional at least once a year.
The most common odor problem from water heaters is a rotten egg smell that comes out of your faucets and fixtures when running water. This smell is typically caused by sulfate bacteria that can develop within the tank.
If your water heater is reeking of sewer odor, rotten eggs, bleach, gas, or even fish, don't worry, you're not alone. Water heater odors are a common occurrence in households. It also happens in faucets and other fixtures where running water passes through.
You should have your water heater serviced at least once per year. The most important part of water heater maintenance is flushing the tank. If you don't flush it, sediment will build up inside your water heater's tank.
You should be aware that the cylinder installed in your property is a pressurised container and will require regular maintenance just like a gas boiler. An annual check is vital to ensure your safety and must be carried out by a qualified engineer.