Replace Worn Rubber Washer on Stem

What happens here

Examine the faucet stem you just removed. At the very end of the stem (the part that sits inside the faucet body and controls water flow), there will be a rubber washer, often called a seat washer, usually held in place by a screw. This washer is typically the primary cause of drips. Remove the screw and the old, worn-out rubber washer. Compare it to a new replacement washer to ensure you have the correct size and type. The video shows a clearly worn-down washer, indicating it was indeed the culprit. Install the new rubber washer onto the stem and secure it with the screw you removed earlier. Ensure it's seated properly and firmly attached.

Goal: Install a new seat washer for a watertight seal