Hi all- question. Gas furnace/water heater flue piping.
I see:
no screws
water heater flue just cut in/pushed in side of larger
Flue through ceiling–in direct contact with combustible material/not 1" clearance
Question- type C to type B connection
Is there a special adapter/clamp/etc?
Is this ok?
Appreciate any feedback.
Did you check the Y connection to see if it was loose? Some of those connectors can look like they are not sealed but actually are. Kinda like this one, it has rivets but doesn’t look like it is sealed very good
Did you note the caulking and moisture stains on the ceiling?
Thanks for the response!
Yes- i got the stains/caulk and also missing grounding wire on water heater.
For the flue pipe- i will check again (pick up radon)
But it looked like there were marker/marks where it looks like installer may have cut out the hole.
The one question i am not sure is where the type C single wall enters the B
I can’t tell what that connection is like>> it looks like a gap as you see in pict. but i am not so familiar with what it looks like inside.
is this ok?
is there a special adapter/clamp/etc?
The single-wall wye enters the b-vent, thus the gap you see. The b-vent is double wall. The wye connects to the inner wall of the b-vent, exposing the gap. Ideally the connector should be all b-vent from the hood adapter. This is more expensive and thus a single-wall connector (aka smoke pipe) is used. 3 or more screws should secure the connections of the single-wall connector, and now an approved tape is also allowed but is a maintenance nightmare when the service tech needs to disconnect and reconnect it. Screws are much easier to service with.
Yes, there should be a 1"+ clearance gap maintained at the ceiling penetration using a thimble/firestop plates.
