How to Fix a Leaking Kohler Shower Valve | Step by Step Repair Guide, by DIY FIX on YouTube. 5 min 21 s.
- Video length
- 5 min 21 s
- Time to do it
- 45 minutes
- Difficulty
- Medium
- Steps
- 9
What you need
Steps
Shut off the hot and cold water at the main valve or the shutoffs feeding the bathroom, then open the shower valve to release the remaining pressure.
Pry off the index cap on the handle with a small flathead screwdriver and undo the set screw underneath. Pull the handle straight off the stem.
Remove the screws holding the trim plate and lift the escutcheon off to expose the valve body and the cartridge or mixer cap inside the wall.
Identify the exact Kohler valve model. Look for a stamped number on the valve body, or photograph it and match it to Kohler's parts list before you order anything.
Twist off the retaining ring or mixer cap with a strap wrench, then pull the cartridge straight out of the valve body.
Inspect the cartridge, O-rings and seat for cracks, grit or flat spots. Replace the whole cartridge rather than just the rubber rings if the plastic is scored.
Wipe the inside of the valve body clean and coat the new O-rings with silicone plumber's grease. Do not use petroleum jelly, which damages rubber.
Push the new cartridge in until it seats fully, refit the retaining ring, and check that the hot and cold markings line up with the valve body.
Refit the trim and handle, turn the water on slowly, and run the shower for a minute to check for drips at the spout and around the trim.
Tips and common mistakes
Never force a stuck cartridge with pliers, since you can crack the valve body; use a proper cartridge puller.
Put the drain plug in or tape over the drain so dropped screws and springs do not disappear down the pipe.
A handle that is hard to turn usually means dry or gritty O-rings, so grease them before assuming the cartridge is dead.
If the temperature swings between hot and cold, check the pressure-balancing spool and replace the seals on both sides.
Questions
How do I know which Kohler cartridge I need?
Find the model number stamped on the valve body behind the trim plate. Take a photo of the old cartridge and the number to a Kohler dealer or parts site to match it exactly.
Do I have to replace the whole shower valve?
Usually not. A drip or a stiff handle is nearly always the cartridge or its O-rings, so a small parts swap fixes it for far less than a new valve.
Why is my shower still dripping after the repair?
Grit or a rolled O-ring under the new cartridge is the common cause. Pull it out, rinse the valve body, grease the rings and reseat it squarely.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
