Insulating in/out pipes from Nat Gas HW tank
It seems to be a bit of a conundrum, we are supposed to insulate the in/out lines from our hot water tanks (many new tanks are supplied with foam insulating sleeves) yet we're supposed to keep combustibles 6" or more away from the flue...and of course the open part of the flue hat.
The water lines on my tank are particularly close to the flue hat, in fact the edges of the plastic disks that cover the inlet/outlet that face the flue have actually melted a little. I checked the exhaust gas flow with a candle and it draws up the b-vent correctly.
I had considered using the fibreglass pipe wrap covered with foil duct tape at least along the adjacent part to the b-vent/flue, and the foam sleeving further up.
I know the plastic foam is probably flame-retardant but I'm sure they'd melt that close to the flue.
Am I over-thinking it?