Alex wrote:
Hi everyone,

In my 25 year old home the bath tub has a drain where it's controlled
by a switch on the front/inside of the tub. It's gotten where even
when the switch is moved to open the drain will slowly close in about 5
seconds. Is it possible to either repair the drain switch or replace
it all together with one of those pop stoppers or even a plastic
stopper?

Thanks --

Sam

More than likely, all you need to replace is the
"trip lever faceplate":
http://www.azpartsmaster.com/shopazp/Bathtub+Overflow+Plates+-+Trip+Lever+(6397A).html

The lever has a friction pad that is supposed to keep it one
position. Yours is probably worn out.

Installing a complete new drain fitting (waste and overflow)
for the popup drain can be(come) a *huge* project.

Jim