Water Heater Expansion Tanks

Water Worker water heater expansion tanks are offered in 2 and 4.4 gallon sizes and can accommodate water heaters up to 80 gallons. Water Worker safety tanks are manufactured in the USA with the highest quality standards and offer a 5 year warranty.

Features and Benefits:

  • Easy to install
  • Strong steel tank with enamel finish prevents corrosion in damp areas
  • Heavy duty diaphragm for extended life
  • Polypropylene liner provides a corrosion resistant reservoir
  • Welded air charge fitting with protective plastic cap for corrosion resistance and air tight seal
  • Solid bronze saddle accepts L&M tubing

All U.S. Water Heating manufacturers require the installation
of an expansion tank in closed piping systems.

Clcik for Comparison Chart


Water Heater Expansion Tanks
Model Description UPC WT L W H Qty
G-5 2 Gal Tank 00815900137 8 8.5 8.5 13 1
G-5L 2 Gal Tank w/o Valve 00815900083 5 8.5 8.5 15 1
G12 4.4 Gal Tank 00815900144 12 11.5 11.5 15 1
G-12L 4.4 Gal Tank w/o Valve 00815900090 9 11.5 11.5 15 1


Make sure to select the tank size suited to your current heating system.
Water Heater Size Minimum Tank Volume Water Worker® Model
Up to 50 Gal 2 Gallon G-5
Over 50 Gal 4.4 Gallon G-12