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Accidentally broke neplax valve, is it still neccesary with OPV?

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  • Accidentally broke neplax valve, is it still neccesary with OPV?

    Question in title...
    And what will happen if pressure gets too high without the valve?

    Thanks

  • #2
    I'll probably buy a new valve from a local store, but I think it will be 11 bar instead of the original 16.5, but that should be fine right?
    Anyway we don't want more than 9 bars at the group head. am I correct?

    Thanks

    Comment


    • #3
      The neplax is for over pressure in the brew circuit. I think the only reason this could pop off is if the brew circuit is at full pressure, and then it is heated by the hx.
      the opv cannot help in that case, as it is on the other side of the one-way valve.

      Maybe....
      You could put a 11bar in there, but your opv would have to be set lower, or the neplax will vent into the drip tray when brewing.
      you will definitely need a opv fitted and adjusted.

      You are far better off having a 11bar valve there, than a blanking plug.

      Comment


      • #4
        Originally posted by Jackster View Post
        You are far better off having a 11bar valve there, than a blanking plug.
        Thanks!
        So if I understand you right, putting a blank is dangerous and cound damage the HX/boiler even with the OPV fitted?

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        • #5
          Just to update, I managed to buy a 12bar valve. OPV not yet arrived.
          No issues with venting to the drip tray...

          Comment


          • #6
            Yes. If you put a blank in there, you may damage machine. The hx pressure cannot go back to the opv and pump as there is a one way valve

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