Expansion Tank - Water Heater Expansion Tank
An expansion tank will add life to your water heater and appliances. Most communities now have check valves on the pipes entering your home. This creates a closed system that puts pressure on your water heater and appliances as water is heated. An expansion tank will absorb the pressure from expanding water.
What Does an Expansion Tank Do?
QUICK ANSWER: Water heater expansion tanks are designed to absorb high pressure. They are recommended if you would like to get full life out of your water heater and plumbing system.
DETAILS: Your first line of defense against a pressure surge is your pressure regulator. Your second line of defense against high pressure is your thermal expansion tank. When water is heated it will expand. The expanding water creates high pressure in your plumbing system. High pressure is very bad for your water heater and plumbing system in general. It can cause your appliances and pipes to fail prematurely. Premature failure almost always results in water where you don’t want it to be. Keep in mind. If your pressure regulator is not working properly your expansion tank will not work properly. It is best to change them together to ensure that one doesn’t cancel the other out.
BENEFITS: Extends the life of all your appliances and plumbing fixtures in your home. An expansion tank will usually curb water hammer and banging pipes. When used in conjunction with a pressure regulator it will prevent leaky faucets, toilets that fill without flushing, broken ice makers, damaged dishwasher and malfunctioning RO systems.
Water Heater Expansion Tank Installation
This video was done by a home owner and not a plumber. Here is the video description he posted -
I'm not a plumber, just a homeowner like you. Replacing your water heater expansion tank is essential for long life of your water heater and appliances. It relieves fluctuating pressures, preventing water hammer (that 'clunking' sound you hear in the pipes when you shut off your water faucets).
VERY IMPORTANT! You will see other videos that show the tank installed horizontally. This is INCORRECT and I'm amazed that even professional plumbers have instructional videos showing to install them this way. Install yours ONLY vertical (as I show in this video) if you want it to work properly. This comes direct from the manufacturer.
This is an easy install and requires just a wrench, water pressure gauge, tire pressure gauge, teflon pipe tape or pipe dope and a about 25 minutes.