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Regulator and backflow preventer

photokynetics
photokynetics Member Posts: 52
in Plumbing

I have read in a couple of places that mention the pressure regulator in this aqua balance boiler freshwater fill line

20240914_123401.jpg

system should go after the backflow preventer, anybody agree with this?

If that's the case previous owner plum this One backwards.

Comments

  • photokynetics
    photokynetics Member Posts: 52

  • Intplm.
    Intplm. Member Posts: 2,200
    edited September 15

    You have a very tight spot there for sure. See if you can get a look at the bottom or the side of the unit. The arrow [and] direction of flow need to be verified.

    th.jpg

    Take a look at this picture. See the arrow. It might prove your suspicions correct. You will need to turn the thing around if your direction of flow is wrong. So which way is the water coming from? Varify that and go from there.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,495

    water flow must go through the backflow before the prv

    Teemok
  • photokynetics
    photokynetics Member Posts: 52

    The arrows on the regulator and the backflow preventer are pointing in the right direction, I just replaced the backflow preventer because it was causing a lot of problems with the loss of pressure. Now once in a while the pressure regulator will hang up and all I got to do is fiddle with it and it goes back to working for a while.

    What does LWCO metal?

  • photokynetics
    photokynetics Member Posts: 52

    I don't see a reason why the regulator can't be taken apart and cleaned so it can be reused, or is this not a good idea?

  • hot_rod
    hot_rod Member Posts: 23,405

    A small speck of dirt or rust can cause both a backflow and fill valve to leak

    That backflow should have a small screen on the inlet side. This is usually adequate to protect both. Unless you have a large amount of crud in your water

    If you have a leak free system you would be able to turn off that fill assembly. Many hydronic installers insist on the valve being left off.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • photokynetics
    photokynetics Member Posts: 52

    When I replace the backflow preventer I remember it had a screen on the inlet side to filter debris, but it's obviously in the wrong location so I will take the pressure regulator off and take it apart clean it up good and then I'll swap the two the way they belong

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