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Scary ...huh??

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  • Steamhead
    Steamhead Member Posts: 17,008
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    Water heater safety valve port?

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    Mad Dog_2
  • mattmia2
    mattmia2 Member Posts: 9,962
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    the probe was still in there….

    Mad Dog_2
  • DCContrarian
    DCContrarian Member Posts: 305
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    Just snake it out, I don't see the problem.

    Mad Dog_2
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,389
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    Hi, That does look like a T&P was in there. What was the complaint that got you to remove it? Also, what is the water quality like? Looks like the anode was working very hard to protect the brass relief valve 🧐

    Yours, Larry

    Mad Dog_2
  • mattmia2
    mattmia2 Member Posts: 9,962
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    Knowing @Mad Dog_2 he was there for something else and wasn't leaving without testing the t&p valve and found it that way.

    The anode in my old water heater and pretty much everything else in ann arbor water looks like that.

    Mad Dog_2
  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,250
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    You don't see a problem? The relief pathway is 90% blocked...Mad Dog πŸ•

  • JakeCK
    JakeCK Member Posts: 1,417
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    Oh look an IED, in your basement/closet/somewhere in your home. :p

    Mythbusters had blowing them up down to a science.

  • Larry Weingarten
    Larry Weingarten Member Posts: 3,389
    edited July 9
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    Hi, A pound of steam being 1700 times bigger than a pound of liquid water, I like to ask people where the other 1699 water heaters are going to go. It usually gets them to pause a bit. πŸ€” Dan showed me this long ago:

    Yours, Larry

    mattmia2delcrossv
  • STEAM DOCTOR
    STEAM DOCTOR Member Posts: 2,041
    edited July 9
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    See this all the time. And it is scary. Wonder if the same problem exists when relief valve is mounted on the top of the water heater, instead of the side.

  • Intplm.
    Intplm. Member Posts: 2,084
    edited July 9
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    That's a very good point. In recent years, I have seen manufacturers putting relief valves on the top, and not as much on the side. I was under the impression that that was going to be the common practice. Is this the reason for the build-up in this port?

    The relief valve in this case would probably still work but not completely close after discharging.

  • ChrisJ
    ChrisJ Member Posts: 15,922
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    If the minerals attach to the side of the tank near the top why would the very top which is still in contact with the water be any different?

    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
  • STEAM DOCTOR
    STEAM DOCTOR Member Posts: 2,041
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    Maybe stuff would drop out and not accumulate there? Just speculating.

    Intplm.
  • mattmia2
    mattmia2 Member Posts: 9,962
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    probably easier to punch another hole in the top dome and weld on another bung and only punch holes in the top cover than to have to deal with a hole in the side of the tank and the jacket.

  • Larry Weingarten
    Larry Weingarten Member Posts: 3,389
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    Hi, Yes the problem still exists even if the relief is mounted in the top head of the tank. The anode protects whatever it can "see". 😎

    Yours, Larry

  • hot_rod
    hot_rod Member Posts: 22,483
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    Minerals plug up dielectrics and nipples on the top of tanks, probably the relief valve ports on top also.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream