Quote Originally Posted by frayedend View Post
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.
A couple points of clarification :

1)The MD plumbing is attached to the side of the unit and the hydrostat is in the bottom. Therefore, blowing air through the piping is VERY unlikely to correct a hydrostat problem.

2)As long as the stat is opening, it's Very unlikely that the liner will float, if more water gets under the pool, the hydrostat will let it in the pool until the pool level equalizes with the ground water. This may delay your entering the pool to fix the hydrostat, but the liner ought not float. (I suppose a flash flood could overcome the valve's ability to equalize the pool/ ground water).

When you do get down to the drain, remove the cover and you'll see the hydrostat sticking up from the bottom of the drain pot. Pull the top plate of the stat all the way up, and let the spring pull it back down, a couple of times - this should clear debris from the o-ring and sealing surface.

Before you start refilling the pool, dye test the hydrostat (and, if it passes), re-secure the MD grate.

You seem to misunderstand hydrostats, what they do and how they work - if you fire up a new thread on that subject, I'm sure a few folks will answer (I'm a little pressed for time on tax day)