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Interpretation #8103

Original Request

  • Date: April 10, 2018
  • Requested By: Tim Rygiel
  • Requester E-Mail: timrygiel@hotwiremail.net
  • Code Version: 2017
  • Code: PLUMBING
  • Code Description:
  • Chapter:
  • Section: 607.3
  • Topic: Thermal expansion control

  • Question: Is it the intent of the Florida Plumbing Code to deviate from the International Plumbing Code and allow devices other than expansion tanks for thermal expansion control?

Answer on 04/10/2018 at 1:58 PM

Yes. During the 2015 IPC code change cycle, this section was modified to eliminate all other forms of thermal expansion protection except thermal expansion tanks. In the following 2018 cycle, however, this section was corrected to read "thermal expansion control device", restoring a wider range of options. During the development of the 2017 Sixth Edition of the FBC-P, the Florida Building Commission adopted the language of the 2018 IPC, which provides for a greater range of thermal expansion options.

Commentary:

Chapter 553 f.s. does not allow for the FBC to be discriminatory against materials products, or construction techniques of demonstrated capabilities. There are a number of listed devices to address thermal expansion. Other state rules regarding thermal expansion protection in areas of reclaimed water use required the municipal water purveyor to provide this protection. The use of an externally installed thermal expansion relief valve has advantages in relation to cost and access for maintenance.