Where do you put an expansion tank on a water heater?
But if your system does have some type of limiting valve, it is a good idea to install an expansion tank, even if it is not required the local code. An expansion tank is generally installed directly above the water heater by means of a tee-fitting installed in the cold water delivery pipe.
Do you need thermal expansion protection on a water heater?
Thermal expansion protection is required on new water heater tanks. Thermal expansion protection can be done 3 different ways: installing a thermal expansion tank properly sized for the tank. using a thermal expansion relief valve. using a governor 80 ballcock.
What happens when water is heated without an expansion tank?
Water expands as it heats up, and without an expansion tank attached to the water heater, a closed plumbing system can experience damage from this thermal expansion. For example, when water is heated from the temperature of 50 to 120 degrees Fahrenheit, the volume increases by approximately 2%.
When do you need an expansion tank for a plumbing system?
An expansion tank is most critical in closed plumbing systems, where some form of pressure-limiting valve or back-flow valve prevents the expanding water from backing up into the municipal water main.
Is an expansion tank really necessary for a hot water heater?
From a building code perspective, expansion tanks are not required for tankless water heaters where no storage tank for hot water is installed. In most cases, they are used as a preventative measure to prolong the life of your water heater and reduce the risk of ‘overworking’ your plumbing system.
Why must a hot water heater have an expansion tank?
Because it reduces pressure, an expansion tank prolongs the life of your water heater. In fact, some manufacturers may void your water heater warranty if you have a closed plumbing system without an expansion tank.
Where do I install expansion tank?
Expansion tanks are normally installed above the water heater on the cold water line before it enters the water heater; however, they can really be installed anywhere on the cold water line prior to entry into the water heater.
What are the symptoms of a bad expansion tank?
There are several signs of thermal expansion tank problems. One of these signs is slow flowing or low-pressure water coming from your water heater. This can be a sign of mineral buildup and of your expansion tank failing. Another sign of expansion tank problems is condensation.
