Sump plumbed to water drain

[prosnow]

i dont see why you couldnt...have a bulkhead towards the top of your sump plumbed into your line, you'd have to have a pee trap or whatever there called to prevent gasses from coming back into the tank...plus if you have that plumbed you could add another line to directly dump your waterchange water.

my 2 cents, but what the hell do i know i'm an electrician