On Sat, 24 Mar 2012 12:23:22 -0500, Steve Kraus
wrote:

go below disassemble the drain and replace the stopper unit. its part
f the drain unit.

hopefully you have easy access

Sadly, no. Concrete slab floor and what's more, on the other side of the
this lav is another one, a little larger and the sinks, toilet, and bathtub
are back to back with each other.

Concrete slab or not, there has to be some way to get to the drain pipes
under there. It's not like they poured the floor after the tub was
installed. Unfortunately as a last resort, you'll have to remove the
tub. Hopefully you wont have to do that.

Just to be clear, this is not a pop-up stopper. It's a hidden plug that
drops down in the overflow passage way. Even with access I don't know if
there is anything to disassemble from below or behind.

Why not take off the overflow pipes and see if you can get it out from
there. Once it's out, leave it out and get a plain old rubber plug.
Some of those contraptions are more trouble than they are worth.

I'm having a problem understanding what you have in there. See if you
can find a webpage with a drawing of the thing or exploded view. There
is likely one on there. Then post the url. It sure sounds like a popup
stopper to me??????

By the way, they sell a device that works similar to a popup stopper,
except you step on it to close it, and step a second time to open it.
It mounts right into the drain, and dont have all kinds of levers and
rods to get stuck or break. That might work as a replacement, if you're
the kind of guy what dont want a rubber plug. (Myself, I'll stick with
the rubber plugs.... simple, cheap, and easy to use, as long as the kids
or dog dont run off with them).