Out for a furnace maintenance today for a regular customer.
Walk into the furnace room and notice something very wrong.
Venting failed on the water heater vent not on the glue joint but on the elbow itself. Fifteen years old.
This is why Canada banned ABS pipe for all new HVAC installation work August of 2007.
After showing the shocked owners I asked if they had smelled fumes or had headaches. They said no and had just returned from an extended vacation.
Someone was looking out for them
Cut out the faulty section and added new pipe and fittings.
I think they will be calling for a quote on an electric water heater