Oil boiler with tankless coil quick question read all posts and need one more answer

Discussion in 'Boiler Forum' started by Jeff Sicoli, Jan 31, 2014.

  1. Jeff Sicoli

    Jeff Sicoli New Member

    Jan 31, 2014
    New York
    I have a laars Newport oil boiler with tankless coil. The system is completely drained and when I fill the pressure relief valve leaks and psi goes over 30.
    I have replaced the following
    Expansion tank and air release value

    New pressure relief valve and before pressure relief value there is also another air release changed that also

    I also adjusted the pressure on the auto fill valve which didn't help so I put it back to Orginal setting

    I see everyone posts turn off the valve that feeds the auto fill and see if psi keeps rising. I did that and the psi stops rising. But my problem is the shut off valve is before the auto feed valve and the copper that leads to coil in the same line so how else can I checkif iit's the coil or the auto feed
    Thank you very much
  2. Tom Sawyer

    Tom Sawyer In the Trades

    Nov 29, 2010
    You have to isolate the piping by cutting in another valve.
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