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Therm-X-Trol in Line Thermal Expansion Tank, 4.4 Gallon Volume


  • Locke Part #: E0301
  • Mfg. Part #: EXPT4
  • Manufacturer: Amtrol Inc

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  • Accepts expanded water caused by thermal expansion
  • Returns water to the system when hot water is used
  • Prevents dripping faucets, intermittent toilet fill and pressure relief valve discharge
  • Protects water heater, appliances and fixtures
  • Eliminates wasted energy and water
  • Prevents dangerous pressure buildup
  • Required by most building codes where backflow preventors are specified

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