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EFIELD

EFIELD Water Heater Expansion Tank, 2.1 Gallon, 3/4 in MNPT Connection, Thermal Pressure Protection, Safe for Potable Water,(TANK001)

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$39.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Apr 20
Order within 16 hours and 13 minutes
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Size: 2.1 Gallon


Features

  • Reliable Pressure Protection: Safeguards your water heater and plumbing system by absorbing excess thermal pressure, preventing damage
  • Safe for Drinking Water: Certified for potable water use, ensuring clean and safe water for your household
  • Easy 3/4" MNPT Connection: Features a standard 3/4-inch MNPT connection for quick and hassle-free installation
  • Compact 2.1-Gallon Design: 2.1-gallon capacity provides optimal pressure relief while fitting seamlessly into tight spaces
  • Built for Long-Term Use: Constructed with high-quality materials to deliver reliable performance and peace of mind

Brand: EFIELD


Capacity: 2.1 Gallons


Special Feature: Thermal Pressure Protection


Color: White


Style: Tank


Special Features: Thermal Pressure Protection


Mount Type: Floor


Is Electric: No


Color: White


Style Name: Tank


Capacity: 2.1 Gallons


Brand Name: EFIELD


Model Number: TANK001


Manufacturer: EFIELD


Global Trade Identification Number: 55


Manufacturer Part Number: TANK001


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Light weight and easy to mount and tie into the cold-water intake side of the water heater.
Size: 2.1 Gallon
Came pressurized at 40 psi. Was easy to adjust to 50 psi to match the water pressure in my house. Easy tie into the tee connection added to my water heater with a waterline with 3/4" fittings on both ends.
Reviewed in the United States on April 6, 2026 by MST
    • Good thermal expansion tank
Size: 2.1 Gallon
Item came as described. Really appreciated that it's well boxed to keep it from getting dinged or damaged. Threaded in good and didn't leak. What more can you ask for?
Reviewed in the United States on March 22, 2026 by Jessica B.
    • Expansion take
Size: 2.1 Gallon
Well made, precharged, installed and working as it should
Reviewed in the United States on March 30, 2026 by David H.
    • tank
Size: 4.5 Gallon
works great
Reviewed in the United States on March 12, 2026 by They fit great
    • Easy to install
Size: 2.1 Gallon
Easy to install
Reviewed in the United States on March 24, 2026 by Grumpy Rhino
    • Looking great
Size: 4.5 Gallon
Quality construction and look good. The finished paint looks great too. As far reliably we will have to wait and see.
Reviewed in the United States on February 16, 2026 by Neil B.
    • Great quality!
Size: 2.1 Gallon
Easy to install and works as it should!
Reviewed in the United States on January 17, 2026 by Keeli Reed
    • Works
Size: 2.1 Gallon
Works as it shud. Install easily
Reviewed in the United States on January 12, 2026 by Roger Alder

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