Gunk can build up inside of the spout and create a gap between the diverter and the opening for the water.
Some spouts slide on and off of the pipe. Typically, they’re screwed on to a threaded pipe. In either case, twisting counterclockwise will work to get it off. This process applies to diverters attached to your spout. If you have a standalone diverter, remove the cap and unscrew the central screw to pull it out. Unfortunately, you need to replace the entire diverter unless your faceplate is loose. In that case, try tightening the screws to see if that fixes it. [4] X Research source
You now have two pieces. The pin/knob, and the diverter valve, which sits inside of the spout and blocks or opens the flow of water. If you have a two- or three-valve diverter, you’ll need to replace the entire assembly. Take the busted diverter to a home improvement store and find a new one.
If the washer looks filthy, cleaning it is very likely to fix your leak. If the washer appears damaged, replace it.
The silicone grease is mandatory. If you don’t grease the washer, it won’t slide smoothly inside of the diverter valve, which will eventually break it. You can buy silicone grease online or at your local hardware store. You generally need to replace the shower diverter’s washer every 4-5 years. [8] X Research source
If you don’t have a flat file, you can use a knife or the tip of a flathead screwdriver to clean the inside of the spout. If you still can’t get the inside of the spout clean, try soaking it in white vinegar overnight.
There should be a divot in the pin where the tabs on the valve slide into place.
Your spout may leak if you skip the plumbers tape. Plumber’s tape is also known as thread sealant.
Don’t overtighten it. So long as the spout is attached firmly to the supply pipe, you’re good to go.
If you can’t get the diverter to open and close properly, the pin may be bent or the valve may be broken. You’ll need to replace the spout.
A replacement spout shouldn’t run more than $20-80.
