Hi, I'm sure I appear irrational, but I could do with some advice. Last night I was cleaning my bathroom. I poured neat bleach down the plug hole of my sink. I intended to only leave it 5 mins before flushing with water, but went downstairs, got busy doing other things and forgot all about it. Several hours later, I discovered that the plug hole was corroded due to the bleach. I rinsed it with water, straight away. I'm worried now in case the bleach has done any damage to the pipe in the sink. I'm in a rented property. Does anyone know anything about this, who could advise? Thank you.