How to Fix a Stripped Shower Knob?

If you’re experiencing issues with your shower knob, it’s likely due to stripped splines on either the knob or valve stem. The spline series on the back of the knob is connected to the valve stem of your faucet, so when you turn the knob, the splines should contact the valve stem.

To determine the root of the problem, you’ll need to remove the cover and carefully examine the splines for any signs of stripping. If you find that either the knob or valve stem is stripped, the best solution is to replace the knob altogether. In this article, we’ll guide you through the process of fixing a stripped shower knob to get your bathroom back in working order.

Reasons why Shower Knob Won’t Turn Water On

If you find that your shower knob won’t turn the water on, there are two main reasons why this may be happening. The first reason is a faulty valve stem, and the second reason is a faulty shower knob. To determine the issue, you can remove the cover and inspect both the valve stem and shower knob for any signs of damage, such as being stripped.

If the issue is minor, you may be able to fix it by servicing or replacing the parts. However, if either the shower knob or valve stem is stripped, you will need to replace it. Replacement parts can be found easily online or in physical plumbing stores, unless you have an uncommon or extraordinary faucet.

To prevent this issue from happening in the future, be sure to avoid overtightening the shower knob, which can cause corrosion and rust. Regularly cleaning your shower faucet with vinegar can also help prevent water damage and leaks.

How to Fix a Stripped Shower Knob?

Step 1

Before you start fixing the stripped shower knob, you need to shut off the water supply in your home by turning off the main water valve. Additionally, make sure you release the remaining water in the pipes before starting the repair.

Step 2

Locate the screws that hold the shower knob in place. The screws are usually located under the cap placed on the knob or inside a small hole on the side of the shower knob. To access the screws under the cap, remove the domed cap with a flathead screwdriver. Then, remove the screws with your screwdriver.

Step 3

After removing the screw holding the knob to the faucet, pull out the knob from the faucet. If you cannot remove the shower knob with your hand, use a puller tool. Hold the shower knob tightly with the puller tool and turn it in a clockwise direction until you can remove the shower knob.

Step 4

Inspect the shower knob to see if it is stripped. If you notice that the series of splines on the rear of the shower knob is damaged, you will have to replace the shower knob.

Step 5

Get a new shower knob and replace it in the position where you removed the damaged one. To avoid any issues while replacing the new knob, make sure the new knob you bought is the same as the damaged one. Use the same tools used to remove the damaged knob for replacing the new one.

Step 6

Turn on the water supply by turning on the main water valve after replacing the new knob.

To fix a stripped shower knob, you will need some tools and materials such as a screwdriver, adjustable wrench, hex wrench, flathead screwdriver, c-clamp, replacement parts, plumbing tape, lubricant, two-part epoxy glue, and retaining clip. If the shower knob is made of plastic, you can use epoxy glue to fix the stripped knob. Tighten the set screw with an allen wrench or a screwdriver. If you are unsure about the installation process, you can always consult a hardware store or a professional plumber.

How to Fix a Stripped Valve Stem?

If your shower knob won’t turn on the water, it may be due to a stripped valve stem. The process for fixing a stripped valve stem is similar to fixing a stripped shower knob.

Follow the same procedure from Step 1 to Step 3.

Step 4: Check for Damage

Check the splines on the shower knob and the valve stem for any damage or corrosion. If the splines on the valve stem are damaged, use a flexible wrench to remove the valve stem. Set the wrench on the valve stem and turn it in an anticlockwise direction until you can remove the valve stem.

Step 5: Replace the Valve Stem

Purchase a new valve stem and replace it in the same place where you removed the damaged one. Put the shower knob back in place and tighten the screws. Finally, turn on the main water supply valve to restore water flow to your shower.


  • To avoid unnecessary stress when fixing a stripped shower knob, ensure that the replacement part you buy matches the damaged one.
  • You cannot replace the valve stem only; you must remove and replace the entire valve.


Fixing a stripped shower knob is a simple process that requires the right tools and a little bit of patience. By carefully inspecting the shower knob and valve stem, you can easily identify the damaged part and replace it with a new one. The three primary tools needed for this task are a screwdriver, a puller device, and a flexible wrench.

About author

Robin Stephen

At Guridio, Robin provide real information about bathroom products, bathroom maintenance, bathroom gadgets, bathroom appliance, bathroom decor idea, and many more.

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