Hydro Neumatic Tank(Waterpressuretank)

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    • #273885
      MasterPlumbers
      Keymaster

      I am looking for the Company named Mark IV Tank in Rogers, Arizona.
      I would like to know if my tank is still under warranty.
      Serial#089125045
      Model#CM4202
      Thank you
      Tammy

    • #288755

      First, someplace on the water heater it should state how long the warranty is or when the warranty expires.

      If the warranty period is 5 years, you are probably out-of-warraty. If a 10 year warranty, you are probably in-warranty.

      That depends on the following: the typical way to read a serial number (with a number like yours) for the date of manufacturer is like this is – the first four digits are the week and year or year and week. Thus your serial number, Serial#089125045, would be the 8th week of 1991.

      Different brands use different codes, however, your s/n date code fits that format.

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