I reseated it, and it doesn't leak anymore. I just wanted to make sure it didn't need to be supported. I think I actually had it on there too tight, I went with the standard hand tight, plus 1/4 turn recommended and it's staying dry. It wasn't really leaking like a sieve, just a few drips until I tried to tighten it up - and forgot the righty tighty, lefty-loosey saying. Whoops. At least the whole tank's worth of water didn't end up on the floor, just some of the water from the overflow that didn't want to play nice and end up in the sump as it flooded out around the drain pipe.....:hmm4: