Water Heater Thermal Expansion Tank Sizing

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.

Water heater thermal expansion tank sizing. 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. 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. Pmc sizing chart for residential water heaters water heater capacity in gallons inletwater pressure 30 40 50 66 82 100. Find out more by visiting our website.

The incoming or supply water pressure and the volume of the storage tank. Reduced and water drains out of the expansion tank back into the system. Expansion tanks are pre charged with a 38 psi air charge. Hot water heater expansion tanks are small but there available in several sizes.

To accommodate the thermal expansion required for higher temperature and or higher pressure. Thermal expansion tank sizing residential commercial. Determining incoming or supply water pressure.