| 1. | Reliance Water Heaters Water Heater ETC-10X User Guide WATER HEATER COMPANY EXPANSION amp PUMP TANKS Reliance Water Heaters 500 Tennessee Waltz Parkway Ashland City TN 37015 Reliance Hotline 1 800 365 4054 www reliancewaterheaters com Jggragpg WHY EXPANSION TANKS ARE IMPORTANT Thermal expansion occurs when water is heated during non use periods The installation of a Pressure Reducing Valve PRV Check Valve or Back Flow Preventer closes the water system leaving water with no room for expansion National S |
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