Question
My lever-actuated bathtub drain stopper is frozen in the open position.
The cover has a “K,” so I think it may be Kohler.
The drain was replaced over 20 years ago.
I no longer have the paperwork.
Before I spend $145 on a new drain assembly, can I clean it?
Also, what brand should I buy if a replacement is needed?
Answer
Try cleaning and freeing the trip lever parts before replacing the full drain.
Many stuck tub stoppers fail because of soap scum, hair, rust, or mineral buildup.
A lever tub drain has hidden parts behind the overflow plate.
These parts move when you lift or lower the lever.
Over time, deposits can make the linkage bind.
The stopper may stay open, closed, or move only partway.
First, remove the overflow cover screws.
Pull the plate and linkage out slowly.
Lay the parts on a towel.
Take a photo before you clean anything.
This helps during reassembly.
Soak the linkage, plunger, and spring in white vinegar.
Let the parts sit for several hours.
For heavy buildup, soak them overnight.
Scrub the parts with an old toothbrush.
Use a small nylon brush inside the overflow tube.
Do not pour harsh chemicals into the overflow.
They can damage finishes and old drain parts.
They can also make future repairs unsafe.
For safer drain care tips, see the EPA Safer Choice program.
After cleaning, rinse and dry the parts.
Apply plumber’s silicone grease to moving joints.
Do not use heavy oil inside the drain.
It can collect dirt and soap scum.
Reinstall the linkage and test the lever.
Adjust the linkage length if needed.
Small changes can make a big difference.
The stopper should move without force.
If the parts are bent, rusted, or pitted, replace them.
A 20-year-old drain has already served well.
Kohler is a good choice if the tub uses Kohler trim.
Brass drain assemblies often last longer than plastic ones.
Other solid brands include Gerber, Watco, and Oatey.
Choose a brass trip lever kit when possible.
Match the finish, pipe size, and overflow style.
Bring the old parts to the store for comparison.
You can also check sizing guides from
Kohler
and installation information from
Oatey.
If the drain shoe or overflow pipe is corroded, call a plumber.
Full tub drain replacement can involve hidden leaks.
That is especially true in older homes.
I’m Chris Mayer, writing for Plumbing 101.
