Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Relief valve

Rodney Summers
Rodney Summers Member Posts: 748
in THE MAIN WALL
IF BOILER PRESSURE IS TO HIGH,TRY INSTALLING THE WATER FEED VALVE.ON THE BOTTOM OF THE AIR SCOOP AND THIS SHOULD SOLVE THIS PROBLEM, IF THERE IN NO LEAKS.

Comments

  • tom_11
    tom_11 Member Posts: 58
    Relief valve

    I have a Weil McLain 468 hw boiler with tankless coil for hw. This morning i went to my basement and there was water on the floor. It came out of the pressure relief valve, it would not reset. I went and got a new watts 30 psi valve in and it worked. I put a new one in 2yrs ago with the same problem. The gauge on the boiler reads 180 D 30 psi,is it normal for this to happen in two years? Thanks tom
  • lee_7
    lee_7 Member Posts: 457


    What type of expansion tank do you have? If it is a bladder style tank, sounds like it either lost air charge or bladder failed. If standard expansion tank, sounds like it is water bound.
  • Empire_2
    Empire_2 Member Posts: 2,340
    PRV

    The PRV may be leaking by. 30 psi is to high and on the edger of popping the new relief valve. Drain to 12 psi and shut off the water to the PRV. Then operate for a few day's and see what your pressure is during a normal cycle. Open the valve back up and if the pressure raises, you PRV is leaking by.

    Mike T.
  • Unknown
    Unknown Member
    And the third possibility

    The tankless coil may be leaking into the boiler, raising the pressure.

    Noel
  • tom_11
    tom_11 Member Posts: 58
    Relief valve

    It has a vent rite Diaphram expansion tank.12 psi max 60 psi 240 max temp.How do you find out if the coil is leaking? thank you tom
  • ddenny
    ddenny Member Posts: 75


    turn off the make up water, let some water out of the boiler until the gauge reads about 5 #. if the pressure goes up and you're sure the expansion tank is ok then the only way water could be getting into the boiler is through the tankless coil.
  • lee_7
    lee_7 Member Posts: 457


    check to see if you have air in expansion tank. at bottom of tank there is a tire pressure type air valve, like on your car tires, remove plastic cap and depress valve core a little bit. If Air comes out bladder is ok, if water comes out bladder bad. Just press valve quickly. You will need to remove pressure from system to check air pressure in tank. Tank should hold 12 psi in air pressure.
This discussion has been closed.

Categories