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Rick
Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 21550
Experience:  Licensed Master plumber with 40+ yrs. experience.
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We just moved into a new house. when the utilities company

Customer Question

Hi, we just moved into a new house. when the utilities company came to turn on the gas we were told that there was carbon monoxide leaking into the garage where water heater is. I checked for any blockages in the flue pipe and there is none. what else could be causing this problem?
Submitted: 2 years ago.
Category: Plumbing
Expert:  Rick replied 2 years ago.
Is anything else in the garage? how did they know there was CO in the garage? was it showing up when the heater was running?
Customer: replied 2 years ago.
nothing else in the garage. I'm guessing that his CO detector picked it up. his exact words were, I can't turn on your water heater because the carbon monoxide is leaking back into the garage. then he told us that there could be a blockage in the flue pipe. but there was no blockage at all. he left a service card that said "downdraft"
is the reason it's a hazardous condition
Expert:  Rick replied 2 years ago.
How is the heater vented? does it have a fan? does it go through the roof or out the side wall?
Customer: replied 2 years ago.
Through the roof. It's a one story house so it was pretty easy to check if there was a blockage.
Expert:  Rick replied 2 years ago.
Did you check inside the flue passage of the tank?
Expert:  Rick replied 2 years ago.
How far above the roof does the vent extend?
Customer: replied 2 years ago.
I got above the water heater and I pulled out this long thin spiral metal piece. I didn't pull it all the way out because I didn't know what it was
Customer: replied 2 years ago.
it extends a pretty good way at least two and a half or three feet
Expert:  Rick replied 2 years ago.
It's a baffle, did you look inside the flue passage? inside the combustion chamber?
Customer: replied 2 years ago.
I did not. what should I look for in there?
Expert:  Rick replied 2 years ago.
Any obstruction besides the baffle in the flue passage. Any debris/rust in the chamber and/or on the burner
Customer: replied 2 years ago.
there is a yellow hose that is connected to the water heater but not connected to anything else
Customer: replied 2 years ago.
it is very difficult to add pictures and send them on this website
Customer: replied 2 years ago.
I apologize for sending the same pictures over and over
Expert:  Rick replied 2 years ago.
I don't see a yellow hose. I see the baffle which should be in the tank flue passage. I assume the vent was connected at some point and it's only disconnected now because you're checking it out
Customer: replied 2 years ago.
Yes. thats correct. I'm trying to send you a picture of the yellow hose now
Expert:  Rick replied 2 years ago.
Ok
Customer: replied 2 years ago.
This is it
Expert:  Rick replied 2 years ago.
Ok, there's no way this water heater can produce carbon monoxide. That "hose" is the gas connector. The water heater isn't even hooked up to a gas line.
Expert:  Rick replied 2 years ago.
If you got a high CO level in the garage and the water heater is the only gas burning appliance in the garage then the only place CO could come from is your car.
Customer: replied 2 years ago.
is it possible that the gas company disconnected the water heater?
Expert:  Rick replied 2 years ago.
All they have the authority to do is turn it off and lock you meter if conditions are bad enough
Customer: replied 2 years ago.
This is the flue passage. I took out the coil thing
Expert:  Rick replied 2 years ago.
I don't see anything wrong. You haven't given me any indication that anything is wrong with this heater other than the fact that the gas isn't connected.
Expert:  Rick replied 2 years ago.
Do you have any more questions?