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Water Expansion Tank

Water Expansion Tank 

  • Expansion tank are designed to absorb the increase volume of water created when the hot water storage tank is heated and keeps the system pressure below the relief setting of the T&P relief valve.
  • These tanks can be used with most standard hot water heaters and storage tanks.

Technical Information
Factory Pre-Charge  
35 PSI 
System Connection  
304 Stainless Steel
Max Working Pressure
 150 PSI
Max Operating Temp  
200 F
Connection Size  
3/4 Male Pipe Thread



*Stocking Data is current as of 8/25/2026 7:49:02 PM PT


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Product Name Size/Color SKU Unit Quantity Price
Water Expansion Tank HD 2.1 Volume Gallon 04845 EA
Price: $74.95
Water Expansion Tank HD 4.5 Volume Gallon 04846 EA
Price: $118.45
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