If you have a tankless water heater, you may not need an expansion tank. These units heat water on demand, so there’s no need to store hot water in a tank. However, if your home has a high water demand or you have hard water, you may need an expansion tank to help prevent your water heater from overheating or becoming damaged.
If you have a tankless water heater, you may be wondering if you need an expansion tank. The answer is maybe. If your tankless water heater is the only source of hot water in your home, then you probably don’t need an expansion tank.
However, if you have a tankless water heater and another source of hot water (such as a boiler), then you may need an expansion tank to prevent the water in the system from getting too hot.
Tankless Water Heater, Thermal Expansion Tank
What happens if you don’t have an expansion tank on water heater?
If you don’t have an expansion tank on your water heater, the water pressure in the system can build up to a point where the water heater could burst. This would release a large amount of water into your home, causing extensive damage. It’s important to have an expansion tank installed on your water heater to avoid this potential disaster.
Does a Rheem tankless water heater need an expansion tank?
A Rheem tankless water heater does not need an expansion tank. This is because a tankless water heater heats water on demand, so there is no need to store hot water in an expansion tank. However, some jurisdictions require an expansion tank to be installed with a tankless water heater.
Where do you install expansion tank on tankless water heater?
If you have a tankless water heater, you may be wondering where the expansion tank should be installed. The expansion tank is a small tank that is connected to the water heater and is used to store excess water that is heated by the water heater. This excess water can cause the water heater to overheat and damage the unit.
By having an expansion tank, the excess water can be stored safely until it is needed.
The expansion tank should be installed on the cold water line that goes to the water heater. This will ensure that the expansion tank is always filled with cold water.
It is important to make sure that the expansion tank is installed before the water heater so that the excess water can be stored in the expansion tank and not in the water heater.
See also: Gas Leak Water Heater Control Valve
Are expansion tanks necessary?
If you have a hot water heater or boiler in your home, you may be wondering if an expansion tank is really necessary. The answer is yes! An expansion tank is an important part of your home’s plumbing system.
Here’s why:
When water is heated, it expands. This expansion can cause pressure to build up in your home’s plumbing system.
An expansion tank helps to relieve this pressure by providing a place for the expanded water to go.
Without an expansion tank, the pressure could build up to the point where it damages your plumbing system or even causes your hot water heater to burst. So, while an expansion tank may seem like an unnecessary expense, it’s actually a very important part of your home’s plumbing.
Credit: reynoldsplumbingrichmond.com
How to install expansion tank on tankless water heater
If your home has a tankless water heater, you may need to install an expansion tank to ensure that your water heater can function properly. Here’s a step-by-step guide on how to do it:
1. Turn off the power to your tankless water heater.
2. Locate the cold water inlet and the hot water outlet on your tankless water heater.
3. Connect the expansion tank to the cold water inlet using a flexible connection.
4. Use a fitting to connect the expansion tank to the hot water outlet.
5. Turn on the power to your tankless water heater.
6. Check the expansion tank periodically to make sure that it is not overfilled.
What size expansion tank for tankless water heater
If you have a tankless water heater, you’ll need an expansion tank to go with it. But what size expansion tank should you get?
The size of expansion tank you’ll need depends on the size of your tankless water heater.
For example, if you have a 50-gallon tankless water heater, you’ll need a 2-gallon expansion tank.
But it’s not just the size of your tankless water heater that matters. You also need to consider the temperature of your water.
The higher the temperature, the more expansion you’ll need.
So, if you have a 50-gallon tankless water heater and your water temperature is set at 120 degrees, you’ll need a 4.5-gallon expansion tank. But if your water temperature is set at 140 degrees, you’ll need a 9-gallon expansion tank.
Of course, you can always get a bigger expansion tank than you need.
Expansion tank electric water heater
An expansion tank is a small tank that helps to regulate the pressure in your water heater. If the pressure in your water heater gets too high, the expansion tank helps to release the pressure and prevent your water heater from exploding.
Most expansion tanks are made of metal or plastic and are mounted on the wall near your water heater.
They are typically small, ranging in size from 2 to 10 gallons.
If you have an electric water heater, you may not have an expansion tank. This is because electric water heaters typically have a pressure relief valve that releases pressure if it gets too high.
If you’re not sure whether or not you have an expansion tank, you can check the pressure relief valve on your water heater. If the valve is open, it’s likely that you don’t have an expansion tank.
If you’re considering installing an expansion tank, it’s important to consult a professional.
Conclusion
If you have a tankless water heater, you may be wondering if you need an expansion tank. The answer is yes! A tankless water heater needs an expansion tank to help regulate water pressure and protect your plumbing system.
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