1. Ian Gills

    Ian Gills Senior Robin Hood Guy

    Messages:
    2,777
    Location:
    USA
    I am about to have my water heater replaced by a plumber. I want to make sure that the plumber uses dielectric unions or brass nipples.

    I might buy some in advance to make doubly sure. What size would you recommend: is it 3.4" FIP or MIP?

    And if I go the brass nipple route should they be 6" long or will shorter do?

    Thanks in advance.
  2. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    go with the brass nipples and 6" is fine.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    heater

    Who is furnishing the heater? Many heaters already have the nipples installed in the tank. If it doesn't, and if he is really a plumber he WILL have the proper nipples on his truck. What would probably happen if you bought the nipples would be that they came from China, had bad threads so they leaked, and the plumber would have to charge you extra for taking them apart and replacing them.
  4. Ian Gills

    Ian Gills Senior Robin Hood Guy

    Messages:
    2,777
    Location:
    USA
    The plumber is a plumber/HVAC guy I used to fix my furnace. He did a reasonable job, and gave me a competitive quote for the water heater. Besides he can get me a Bradford White and I cannot.
    Last edited: Mar 18, 2008
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    Bw

    That heater already has the nipples in it.
  6. Terry

    Terry Administrator Staff Member

    Messages:
    15,121
    Location:
    Bothell, Washington
    [​IMG]
    These are plastic lined water heater nipples.
    They don't normally look like this.
    The plastic lining is supposed to keep them clear.
    The replacement heater, came with plastic lined nipples that had the plastic going up and over the top.
    They must be new and improved.

    I've never seen a brass nipple look like this though.
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