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Replacing Navien Three way valve

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Big Ed_4
Big Ed_4 Member Posts: 2,835
I have two to replace , Came across two within the same day , for the first time . Hot water no heat . I could not purge water though supply . Black and Red have voltage , black and the other color does not ...

I have the valves , extra gaskets for behind the circulator and plenty of seals for connections , with plumbers grease .

Any tips or tools needed to replace would be appreciated

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  • GroundUp
    GroundUp Member Posts: 1,959
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    Find an apprentice with very small hands
    fenkel
  • Big Ed_4
    Big Ed_4 Member Posts: 2,835
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    Look Like I will find out...

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  • Mr_Doyle
    Mr_Doyle Member Posts: 3
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    board has to come out. circulator has to come out. then you can remove 3way. need about 6 o rings. as well as plumbers grease. don't rip the o rings. im probably doing one of these this week. pro tip. buy magnetic screw drivers.
  • Big Ed_4
    Big Ed_4 Member Posts: 2,835
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    I installed my first today , I know now if there is no union between the 3 way and supply pipe cut it out and you will need to install one . The 4 small screws under the cabinet holding the valve , need a straight alignment to remove . To make a short story long it sucked . Give me Bosch

    There was an error rendering this rich post.

  • Mr_Doyle
    Mr_Doyle Member Posts: 3
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    Big Ed_4 said:

    I installed my first today , I know now if there is no union between the 3 way and supply pipe cut it out and you will need to install one . The 4 small screws under the cabinet holding the valve , need a straight alignment to remove . To make a short story long it sucked . Give me Bosch

    ya im kinda hoping i can undo the screws. and spin it out inside cabinet.