Can a boiler work without an expansion tank?
Without an expansion tank, emergency relief valves in the system could actuate under high pressure conditions, dumping large amounts of hot water onto your mechanical room floor. Think of a tightly closed lid on a pot of boiling water!
Where should the expansion tank be installed on a boiler?
Does the expansion tank have to be installed on the cold side? Although expansion tanks can be installed on the hot side, we strongly recommend they be installed on the cold line, downstream of the shutoff valve.
Do I need to replace my expansion tank?
But expansion tanks can wear out. The average life of your tank can be anywhere between five and 10 years. You can extend the life of your expansion tank by making sure that your home’s water pressure matches the air pressure in your expansion tank. But in some cases, you’ll need to replace it.
Should every hot water heater have an expansion tank?
An expansion tank is always highly recommended if you have a ‘closed-loop system’ caused by any kind of check valve or pressure regulating valve installed on your house’s water supply line. A common illustration compares having high water pressure in your home to having high blood pressure.
Where is the expansion tank on a heating system?
Next follow the heating boiler piping from the point at which it exits near the top of the boiler. This is the supply side or hot water side of the boiler. Usually the expansion tank is mounted on the hot or supply side of the boiler and usually it’s located before any circulator pumps.
What happens if there is no expansion tank?
If you see a heating boiler with no expansion tank and maybe no relief valve, it may have one of these systems that simply allow heating water to over-expand up into an attic tank that in turn drains outdoors. Watch out: no heating boiler is safe without a pressure temperature relief valve right at the boiler, even if its expansion tank is remote.
Where is the expansion tank on an Amtrol boiler?
Amtrol’s expansion tank installation instructions specify “Install the EXTROL on the supply side of the boiler, on the suction-side of the heating circulator (s) (see Figure 1).” That is, the location is more critical than the distance.
Why is there an expansion tank in my attic?
The heating system expansion tank will be connected to the heating system radiators or basement boiler and may have a simple overflow pipe to permit excessive water (or system pressure) to spill outside. This attic expansion tank may have been connected to a drain that spilled outside of the building in case the tank became over-full.
How big is an expansion tank for a hot water boiler?
Below are tables sizing expansion tanks for typical hot water (hydronic) heating boiler systems.
What do you need to know about an expansion tank?
To use these boiler expansion tank sizing charts you need to know just the type of heating system radiation used: finned copper baseboard, convectors/unit heaters, cast iron radiators, or cast iron heating baseboards and the heat output of the heating boiler in 1000s of BTUs / Hour or Output BTUh.
Why is my hot water boiler expansion tank waterlogged?
If a hot water boiler expansion tank is waterlogged then you likely have a boiler pressure problem especially if the expansion tank is the steel type. More on types of expansion tanks below. However, it is important to understand expansion tanks and how it works if you are a boiler technician.
How big is an expansion tank for a radiator?
But with a house so large with dozens of radiators & seemingly miles of piping, I can’t begin to imagine how you could calculate the total volume. Isn’t there a way to make this determination using the size of the old expansion tank? Its 12″ x 60″, so about 30 gallons. Thanks for the help.
