Trust Dan to.....wait a minute why the hell are you asking us how often we unclog or pipes?? What will this information do for you??Do you go to sleep and dream about about how we unclo our pipes?? I bet BAB set you up to do this he's always interested in that sort of thing.
Oh BTW I unclogg em when ever they never cleaning, especially when there's something stuck in it.

what?? I'm talking about the pipes to sinks in my house.
