Water Heater Thermal Expansion Tank Sizing

There are two important considerations to make when sizing an expansion tank.

Water heater thermal expansion tank sizing.

Pmc sizing chart for residential water heaters water heater capacity in gallons inletwater pressure 30 40 50 66 82 100. If the inlet water pressure is higher than 38 psi the expansion tank s air pressure must be adjusted to match that pressure but must not be higher than 80 psi. New or larger expansion tanks may be needed due to pressure reducing valves check valves and backflow preventers added to the community s water system. To accommodate the thermal expansion required for higher temperature and or higher pressure.

The incoming or supply water pressure and the volume of the storage tank. Sizing expansion tanks for water heaters can be a complex engineering challenge but residential expansion tank sizing has been simplified through the use of calculators. Thermal expansion tank sizing residential commercial. Expansion tanks are pre charged with a 38 psi air charge.

Amtrol products are made in the usa at our iso registered facilities by american workers dedicated to producing the highest quality expansion tanks in the world. Our sizing guide for potable water expansion tanks helps you find the right watts regulator or data potable tank. Reduced and water drains out of the expansion tank back into the system.