Memories are returning...I once had a school teacher tell me that the reason there was no hot water at the sink at the back of her classroom was because the drain was plugged. I gently tried to explain that there was no connection between the two to which she replied "Oh, I've seen this problem before at home, believe me, I know what I'm talking about." There was in fact no hot water connection at all in her classroom. Good thing she didn't teach plumbing.

Peace, Mooh.