Is it compulsory (code required) to put a union between cold/hot connection and flexible hose?

Discussion in 'Water Heater Forum, Tanks' started by curiousv, Jan 28, 2021.

  1. curiousv

    curiousv Member

    Joined:
    Nov 14, 2019
    Location:
    Tacoma WA
    This is branford white lowboy water heater and instruction manual says ..one should put union between cold water supply line and blue connector on top of tank ....
    I am using connector like this - https://www.homedepot.com/p/1-in-FI...gated-Water-Heater-Connector-173218/306339160

    Which steel flexible connector
    My question is .. can I put this connector directly on to top of that blue connector ? or I must have a union ?

    On hot side I did put a union because I had a union spare ..and flexible hose was little short but on cold side is it MUST?

    What will happen if I don't put union and cold side between this flexible hose and blue connector?

    my theory is ..less joints are less chances of leaks. @Terry
     
  2. breplum

    breplum Member

    Joined:
    Oct 2, 2004
    Occupation:
    Plumbing and heating contractor
    Location:
    San Francisco Bay Area
    Nut x Nut flex is equal to a union and best practice.
    We've been putting flex on water heaters for 40 years, and a requirement in all seismic locales (all of CALIF.)
     
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  4. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Flex connectors in Washington State.
    That's Mt. Rainier in the distance. It's earthquake country.

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