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Carbon Monoxide Alarms going Off

bcoke

Well-known member
Joined
Mar 8, 2013
Messages
341
Location
Pawlet Vermont
Yesterday afternoon the CO alarms went off in the house [new home 4 years old and very well insulated] It is heated with in floor radient by a Gas Condensing Boiler which vents through the wall... I shut off boiler as that was the only combustion in the house [gas stove,gas fireplace were off] opened windows [it was at least 4 or 5 degrees out but at least positive]called Fire Department and asked for them to come out and test air to confirm source........Than I went outside to check the outside vent was clear and discovered that it [ the inner exhaust pipe] was hanging further out than before @ 6-8 inches. Upon inspection I pushed it back into it's fitting in the larger pipe......the inner one exhausts the burnt gas and the larger outer shell allows the combustion air to enter the boiler... when the FD showed they had their CO meter to check the house and the air was clear we started the burner and let it run they then checked the burner's immediate air around it,than basement all rooms ,bathrooms [for methane from traps] all good to go.........We do not know why the outer cap/inner flue pulled away ? snow fall from roof? animal? vibration? but all is ok will have the plumber who installed check it and my question is "should it be pvc cemented into the fitting so it is air tight to outdoors???????...............any comments or suggestions? . bobbycoke
 
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PLOWJEEP

Well-known member
Joined
Aug 29, 2009
Messages
147
Location
Youngsville, PA
Not an expert, by any means, but I think it should be glued. Sounds like you did everything right. Just because it is new doesn't mean can't malfunction. Glad it turned out, for the best. Brian
 

brewchief

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Joined
Sep 20, 2008
Messages
2,370
Location
Michigan
Yes that pipe should be glued in place, it is acceptable to use a stainless steel screw to hold the end cap in place so it can be removed in case of a blockage in the intake pipe.

Recirculation of the flue gasses could have certainly caused poor combustion and created lots of CO but it had to be getting back in to the house somehow, that's what I would be looking for after fixing the vent.

Sent from my XT1254 using Tapatalk
 

jpr278

Well-known member
Joined
Apr 15, 2014
Messages
68
Hopefully the FD told you if it happens again not to open the windows and vent before the house is metered. CO meters do go bad and accumulate CO over time but four years is not that old for a CO meter. Most CO calls our FD goes to we do not get readings with our meter and advise homeowners to get a new meter.
 

yeldogt

Well-known member
Joined
Jan 2, 2012
Messages
18,184
They may have forgotten to glue one section ...

I like to use concentric if exit location can be hidden or a place on the building were it's not objectionable.
 
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kd3pc

Well-known member
Joined
Aug 10, 2013
Messages
3,630
Location
Northern Neck
are the detectors daisy chained and hard wired?? Daisy chained, one may detect and all will alarm.

Hard wired - when we get a brown out or sag in the AC to the house, they often alarm.

Going forward, I would buy one new one this year, another next year and the third a year from the second...that solves the age issue.

glue/screw the pipe..
 

finn

Well-known member
Joined
Mar 27, 2005
Messages
16,282
Location
The UP, God's country
Joint probably wasn’t cleaned and primed on initial installation.

Cold weather and wind / snow separated the bad joint.

My vent stack did that. Cleaned, primed, reglued and it’s been fine for years, even with a heavy snow load.
 

Ji m

Well-known member
Joined
Nov 15, 2017
Messages
579
Location
The Northeast
bump to :thumbup: for doing the right thing

much better than
1b6mtl.jpg


hope it was just a case of forgetting the glue and all is well now
 

NUTTSGT

Super Moderator
Staff member
Joined
Sep 14, 2009
Messages
50,987
Location
Northern Central Ohio
While mistakes do happen, fortunately, you had a CO detector in the home that was working and it was the middle of the day when it alarmed.


Let this be a lesson in life to warn your family and friends about getting a CO detector.




I'm not a HVAC guy but I would be gluing that pipe together.
 
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