To accommodate the thermal expansion required for higher temperature and or higher pressure.
Water heater thermal expansion tank sizing.
There are two important considerations to make when sizing an expansion tank.
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The incoming or supply water pressure and the volume of the storage tank.
Thermal expansion tank sizing residential commercial.
Determining incoming or supply water pressure.
Hot water heater expansion tanks are small but there available in several sizes.
Reduced and water drains out of the expansion tank back into the system.
Our sizing guide for potable water expansion tanks helps you find the right watts regulator or data potable tank.
Pmc sizing chart for residential water heaters water heater capacity in gallons inletwater pressure 30 40 50 66 82 100.
Expansion tanks are pre charged with a 38 psi air charge.
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.