Amtrol Therm-X-Trol Hot Water Heater Expansion Tank – ST-12

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Model: ST-12
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  • Tank Volume: 4.4 Gallons
  • Thermal expansion occurs as domestic water is heated. Left unchecked, the resulting pressure increase can cause relief valve discharge and other potentially unsafe conditions. Therm-X-Trol expansion tanks absorb this expanded water, keeping water pressure at a safe level.