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navien manifold dyi

jvboyle Member Posts: 2
Hi everyone , I'm a home owner installing a new Navien 240 Combi Unit. My local supply house didnt have the Pre-made manifold so i made my own. My question is , On the return , i used a standard 1'' T and i'm not sure if i should have used a monoflow or a Venturi Tee .....Any advice would be appreciated

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  • Danny Scully
    Danny Scully Member Posts: 1,399
    Standard tee is the right fitting. Good luck!
  • Ironman
    Ironman Member Posts: 7,119
    edited May 2018
    Like this:

    The boiler circulator produces circulation through the boiler and another circulator(s) produces flow through the house (primary) loop.

    Regular Tees, absolutely no Monoflo or Venturi Tees.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • jvboyle
    jvboyle Member Posts: 2
    THanks , Ill post some pictures when im all plumbed in !
  • Big Ed_4
    Big Ed_4 Member Posts: 2,239
    .. They use a 1 1/4" , run and spacing of the tees are critical ... No taps for purging the boiler or for a tridicator gauge ... No dielectric unions ... Venturi tee , wrong system , forget about .. Rip it out , make it easy , order the manifold ... Do it right grass hopper
    I have enough experience to know , that I dont know it all