If the water drains out repeat the process above and lower the plunger a little bit more until you get the bathwater to stay in.
Fix bathtub drain stopper spring.
Usually the problem is easy to fix though the procedures vary depending on what type of tub stopper you have.
Many hardware and plumbing stores will rent a device called a drain removal tool.
On the end will be a weighted plug or a spring depending on the kind of stopper mechanism you have.
Replace the flange assembly.
Remove the drain by turning the flange counter clockwise.
A pop up tub train stopper can be replaced in a couple of minutes so long as you know what you re doing.
Adjust the nut on the linkage lengthen it to raise the stopper or shorten it to let it drop lower.
Feed the linkage back into the overflow hole and let the weight fall freely.
Remove the screws that secure the overflow cover plate.
This is necessary if the rod mechanism no longer functions.
These can be hard to remove.
Place the plunger threaded rod and trip lever back into the hole in the tub and screw the plate back into place.
Repair a pop up tub drain stopper with help from a.
Pull the plate and lever away from the overflow hole partially pulling out the mechanism.
Pull the lever out then lift it straight upward to remove the linage from behind the tub.
Push the assembly back in and replace the cover plate.
Some drains have stoppers that are spring loaded operated by a push of the toe or by hand while others use a trip lever mounted on the bathtub s overflow plate.