Step 4 · Check and Adjust New Tank Pressure
Before installing the new tank, you must ensure its internal air pressure matches your home's water pressure. Remove the plastic cap from the air valve on top of the new expansion tank. Use a standard tire pressure gauge to check the factory pre-charge. For this guide, we are assuming a target of 60 PSI. If the pressure is lower than 60 PSI, use a bicycle pump or an air compressor to add air until it reaches the correct pressure. If it's too high, gently press the pin in the center of the valve with a small screwdriver or the back of the gauge to release air. Re-check the pressure until it is accurate. Replace the valve cap once set.