Step 3 · Prepare the New Expansion Tank
Unbox your new expansion tank. Using a standard tire pressure gauge, check the air pressure via the Schrader valve (air stem) located on top of the tank. This pressure must match your home's water pressure. The ideal pressure is often listed on your home's pressure reducing valve (PRV), typically between 50-60 PSI. If the tank's pressure is too low or high, use a bicycle pump or small air compressor to add or release air until it matches. Next, take your roll of Teflon tape and wrap it clockwise around the male threads of the new tank 3 to 4 times. This will ensure a watertight seal.