![]() ![]() The water supply should also be disconnected to prevent pipes from bursting/leaking. ![]() So, shut off the power supply of your water heater.Įlectric shock hazards, explosions, and fires are common among home appliances, and your water heater is not an exception. Follow these beginner-friendly steps to install your expansion tank smoothly : Step 1: Turn off the electric and water supply to your water heater. Now that you have completed the necessary tools and supplies, you are one step away from completing the task. Mounting Bracket (Optional) –When installing an expansion tank, a mounting bracket is required for horizontal setups.Teflon Tape – You would need Teflon tape (also called a plumber’s tape) to seal the dielectric union and threaded fitting of the expansion tank.Drilling Equipment (Optional) –You would only use the drill and bits if you need to mount the thermal tank on the wall (if you have limited vertical space above the water heater).Don’t forget to prepare a screw head (1 and a half inches) for the mounting bracket. Screwdriver and Screw heads – A screwdriver will help you lock the screws on the mounting bracket to secure the thermal tank.You can use either of them, but I prefer using a pipe wrench because it is mostly used in plumbing pipes (it fits into different sizes too). Channel-lock Pliers or Pipe Wrench – You will use channel-lock pliers or a pipe wrench to install the expansion tank accessories.You would also use dielectric unions to keep the copper pipes from touching the steel pipe of your water heater. Generally, when you purchase an expansion tank, it already comes with a complete support kit, including a tee-fitting, female-threaded adapter, and short-length copper pipes. Otherwise, if you have an 80 PSI service pressure, go for a 4.4-gallon pressure tank. This size can also accommodate a 40-60 water heater tank.Īn 80-gallon hydronic tank should have a 2-gallon pressure tank if your water supply has a default pressure of 40 PSI. Typically, a thermal expansion tank comes in two sizes: 2-gallon and 4.5-gallon.įor instance, a 50-gallon water heater needs a 2-gallon expansion tank as it expands to 52 gallons when water is heated. The consensus is that a hydronic expansion tank size should be double the anticipated expansion volume. There are different versions of expansion tanks, and each of them requires a specifically-designed unit. Selecting the correct size of your thermal tank is necessary to limit pressure fluctuations in your plumbing system. When installing or replacing the expansion tank, make sure to prepare the following tools and accessories to complete this small-scale project : Properly Sized Expansion Tank Unit Although most manufacturers recommend installing the expansion tank vertically, you can also do it horizontally or diagonally. Then, the compressed air makes room for the extra volume of water to relieve the system pressure.Ī typical hot water expansion tank installation is not a complex setup to imagine. There, the diaphragm then begins to contract and expand the air. The first side receives the excess incoming water, while the other side is usually dry and has a compressed-air chamber.Īs the water pressure rises, the water presses against the diaphragm. The tank is divided into two compartments separated by the rubber diaphragm. For starters, you must know how an expansion tank works. Step 10: When everything works perfectly, restore the power and water supply.ĭepending on your DIY strategy, a thermal expansion tank installation can take a maximum duration of two hours.Step 9: Open the water supply line and check for leaks.Step 6: Set up the thermal expansion tank pipe.Step 5: Affix the adapter, copper pipe, and tee fitting.Step 4: Grab the dielectric union and attach it to the cold water inlet port.Step 3: If you will install the expansion tank vertically, mark the drilling spot on the wall.Step 2: Prepare the tools and equipment for the installation.Step 1: Turn off the electric and water supply to your water heater. ![]()
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