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corrosion on joints

Wayco WayneWayco Wayne Member Posts: 2,470
edited July 2016 in THE MAIN WALL
We have a Phoenix water heater in an ince rink that has corrosion developing on the copper joints around it. Any idea why this is happening and what can be done about it???

Does anyone have any idea why this is happening and what can be done about it.

Comments

  • nicholas bonham-carternicholas bonham-carter Member Posts: 7,187
    Is it an ammonia refrigeration system-maybe there is a leak.--NBC
  • keyotekeyote Member Posts: 659
    is there a swimming pool or hot tub near by or a janitor that loves him some bleach
  • FredFred Member Posts: 6,487
    That top picture looks like the corrosion is on a cast iron fitting. Not the copper. The bottom picture looks like the corrosion is on the shut off valve, which doesn't look like brass. Looks like someone may have used the wrong fittings and there is a reaction between the copper and those fittings to me. There is one copper to copper fitting in that second picture that looks like maybe a tiny leak in that solder joint.
  • ChrisJChrisJ Member Posts: 8,949
    Fred said:

    That top picture looks like the corrosion is on a cast iron fitting. Not the copper. The bottom picture looks like the corrosion is on the shut off valve, which doesn't look like brass. Looks like someone may have used the wrong fittings and there is a reaction between the copper and those fittings to me. There is one copper to copper fitting in that second picture that looks like maybe a tiny leak in that solder joint.

    They're soldered.
    They're brass.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • FredFred Member Posts: 6,487
    ChrisJ said:

    Fred said:

    That top picture looks like the corrosion is on a cast iron fitting. Not the copper. The bottom picture looks like the corrosion is on the shut off valve, which doesn't look like brass. Looks like someone may have used the wrong fittings and there is a reaction between the copper and those fittings to me. There is one copper to copper fitting in that second picture that looks like maybe a tiny leak in that solder joint.

    They're soldered.
    They're brass.
    I saw they were soldered but they just don't look like brass
  • ChrisJChrisJ Member Posts: 8,949
    Fred said:

    ChrisJ said:

    Fred said:

    That top picture looks like the corrosion is on a cast iron fitting. Not the copper. The bottom picture looks like the corrosion is on the shut off valve, which doesn't look like brass. Looks like someone may have used the wrong fittings and there is a reaction between the copper and those fittings to me. There is one copper to copper fitting in that second picture that looks like maybe a tiny leak in that solder joint.

    They're soldered.
    They're brass.
    I saw they were soldered but they just don't look like brass
    it's either your monitor, or a combination of the camera that took the pictures and your monitor.

    They're soft soldered and you're not going to soft solder cast iron or steel. Silver solder with the proper rod and flux yes but I'm sure that's not the case especially considering all of the propress going on there.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • bobbob Member Posts: 813
    Dezincification. Somethin in the water is leaching the zinc out of the brass. These newfangled brass alloys with no lead have more zinc. Ol' Hot Rod should know a bunch about this.
    bob
  • kcoppkcopp Member Posts: 3,059
    Dezincification was the 1st thing I thought of and then bob mentioned it...
  • hot rodhot rod Member Posts: 8,253
    I would suspect something in the water also, check ph first
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • GordyGordy Member Posts: 7,989
    Quite amazing how water is the most universal solvent on the planet........
  • ChrisJChrisJ Member Posts: 8,949
    Gordy said:

    Quite amazing how water is the most universal solvent on the planet........

    And you have a ton of it all through your floors under pressure just waiting to do damage.

    :)
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
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