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What is this valve and why is water flowing?

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  • 09-06-2024 12:33pm
    #1
    Bogwoppit
    Registered Users Posts: 2,696 ✭✭✭


    Came back from holidays and turned on the OF water heating for about 40 minutes and ran a bath for the kids.
    I noticed this valve is flowing, obviously some sort of pressure or temperature release but I have no idea beyond that and why it’s flowing.
    Pump pressure is 2 bar which is normal I think.

    IMG_3703.jpeg
    IMG_3704.jpeg



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    #2
    Bogwoppit
    Registered Users Posts: 2,696 ✭✭✭Bogwoppit


    large pipe at the front is the feed from the pump.

    IMG_3705.jpeg



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    #3
    Bogwoppit
    Registered Users Posts: 2,696 ✭✭✭Bogwoppit


    The water coming out is hot but not overly hot.



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    #4
    Calahonda52
    Registered Users Posts: 12,391 ✭✭✭✭Calahonda52


    the red pressure relief valve at top of pic 2 is where its coming from, or at least it should be but tough to see.

    the black thing is called a tundish

    “I can’t pay my staff or mortgage with instagram likes”.



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    #5
    Bogwoppit
    Registered Users Posts: 2,696 ✭✭✭Bogwoppit


    https://www.boards.ie/discussion/comment/122237110#Comment_122237110

    Yes, that’s what I thought, thanks.
    Not sure why it would be flowing though, pump is set at 2 bar and the flow stops when I isolate the pump.
    Stuck valve?



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    #6
    Calahonda52
    Registered Users Posts: 12,391 ✭✭✭✭Calahonda52


    there seems to be a second PRV behind the grey valve on the cold feed so this could be stuck open.

    Turn off the cold feed leaver valve and turn the red cap clockwise until it clicks and reseats, same with the top one, then reopen the cold water lever valve

    “I can’t pay my staff or mortgage with instagram likes”.



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    #7
    Bogwoppit
    Registered Users Posts: 2,696 ✭✭✭Bogwoppit


    https://www.boards.ie/discussion/comment/122237151#Comment_122237151

    Yep! One of those did the trick!!

    Lifesaver, I’ll buy you a pint if you’re passing Naas!



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    #8
    Calahonda52
    Registered Users Posts: 12,391 ✭✭✭✭Calahonda52


    Will be at the circle K North on Wed at 2pm

    No worries, however you need to figure out which one was triggered, the grey one is the pressure reduction valve which is preset at either 2 or 3 bar, depends.

    If this had a day off it would actually trigger both red PRVs, the top one is for the hot water but will open if the cold water intake pressure is too high.

    The grey one is downstream of the pump so unless the pump had a day off and the grey reduction vavle has a higher preset than 3 then both red should open.

    Keep an eye on the thread as the experts should be along tomorrow

    “I can’t pay my staff or mortgage with instagram likes”.



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