Thanks for the reply. I made an attempt at getting it to seat by blowing air up through the main drain with my compressor. It didn't work. I was hoping the turbulence would dislodge any debris or get it to seat better. It is draining very very slowly now. I don't think I will be able to do anything until it is low enough to get to. I am just hoping it's still high enough that the liner doesn't float up. It is too cold to jump in or I would be under there trying to fix it.