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Expansion Tank Sizing Tool
Let our easy to use sizing tool help you choose the correct expansion tank for your hot water boiler system!

Choose the Pipe Diameter
Enter the Linear Feet of Piping
Total Gallons
Recomended Products
Pipe Diameter Gallons per linear Feet System Water Content in Gallons Tank Size Needed
1/2" 0.016 up to 26 EXTROL 15
or FILL-TROL 109
3/4" 0.028 up to 57 EXTROL 30
or FILL-TROL 110
1" 0.045 up to 87 EXTROL 60
1 1/4" 0.078    
1 1/2" 0.11    
2" 0.17    
2 1/2" 0.25    
3" 0.38    

Selecting the correct tank can be done in 3 easy steps:

  1. Determine what diameter of schedule #40 pipe your system uses and select it in the drop-down box above. 
  2. Enter in the total linear feet of piping used in your hot water boiler system.
  3. Simply click on the recommended product selected by the sizing tool to view the product page for that expansion tank.