While a screwdriver and adjustable wrench are the main tools, you might also find a utility knife or putty knife helpful for removing old caulk or sealant around the escutcheon. A sturdy pair of pliers can also be useful for stubborn retaining nuts. Ensure your adjustable wrench is appropriately sized for the valve fittings.

The most critical safety step is correctly turning off the main water supply to your house before starting. Forgetting this will result in a significant and immediate flood as soon as you remove the old valve, leading to potential water damage and a much bigger problem than a simple valve replacement. Always test the shower after turning off the main supply to confirm no water is flowing.

Old handles and escutcheons can become stuck due to mineral buildup, corrosion, or paint. Try applying a penetrating oil to any visible screws or around the edges of the escutcheon and let it sit for a few minutes. For stubborn escutcheons, gently pry around the edges with a thin putty knife, being careful not to damage the shower wall or tile.

Yes, 3 hours is a reasonable estimate for a beginner under ideal circumstances. However, the time can increase if you encounter heavily corroded parts that are difficult to remove, unexpected plumbing configurations, or if you need to make an extra trip to the store for a specific part or tool. Patience and methodical work are key to staying on track.