Here's a question that was recently emailed to me:
I was reading your blog and wondered if you could help me. My home is under contract for sale and the buyer's inspector noted that the water heater had a backdraft. I found this odd as it was only installed two months before. I had an HVAC tech come today to check and he verified that he could find no backdraft. Upon looking closer at the inspection notes from the buyer I saw the picture he took of the deformed grommets on the appliance. I called him and he explained that this was a sign of a backdrafting because only the sides near the vent were deformed. I see what he means, but no matter what conditions I produce in the house for fans, vents, open doors, hot water running, furnace on, etc. I can't produce conditions that create a backdraft.Do you have any advice?
Side note: those melted pieces of plastic aren't a problem and they don't need to be replaced. A rep from GE told me those pieces of plastic are only there to identify the water lines.
By the way, yes, that's an illegal flexible connector on my water heater. It was there when I bought my house and I don't have a problem with it.