Water Heater Expansion Tank Sizing Chart

Our sizing guide for potable water expansion tanks helps you find the right watts regulator or data potable tank.

Water heater expansion tank sizing chart.

For a 100 mbtuh boiler you d use either an amtrol extrol 60 or an amtrol fill trol 111. To properly size a watts regulator series plt or deta potable water expansion tank. 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. Pmc sizing chart for residential water heaters water heater capacity in gallons inletwater pressure 30 40 50 66 82 100.

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. For a 175 200 mbtuh boiler you d use an amtrol extrol sx30v. 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.

For 125 150 mbtuh you d use an amtrol extrol 90. Expansion tanks are pre charged with a 38 psi air charge. Enter the appropriate information in the boxes below. 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.

Typical expansion tank sizes for a cast iron radiator type typical residential heating system.