Step 1: Remove the Showerhead

Remove the showerhead and check to make sure debris isn't blocking the flow of water

Step 2: Apply Teflon Tape

Once the showerhead is cleared of anything blocking the water flow, replace the Teflon tape. Wrap it clockwise around the nipple, overlapping it two to three times -- this helps seal the threads and prevent leaking.

Step 3: Replace the Showerhead

Replace the showerhead and check the water pressure.

If the water flow is still weak, remove the showerhead again and double-check to make sure that water is flowing out of the nipple. If the flow is good, that means there's more debris down inside the existing showerhead. Replace with a new showerhead and that should solve the problem.