While a new rain shower head itself doesn't increase your home's overall water pressure, many modern rain heads are designed with wider spray patterns that can make low pressure feel more substantial. Additionally, some rain shower heads have removable flow restrictors that, when carefully removed (and if permitted by local codes), can significantly improve water flow for a better shower experience.

Yes, Teflon tape (also known as plumber's tape) is crucial for creating a watertight seal. You'll wrap it clockwise around the shower arm threads 3-5 times before installing the new shower head. A soft cloth or old towel is also helpful for cleaning threads and protecting your new fixture.

Turning off the main water supply is vital to prevent flooding and ensure you can work safely without water spraying during the installation. Locate your home's main water shut-off valve, typically in the basement, utility closet, or near your water meter, and turn it clockwise until the water flow stops completely.

Overtightening can strip the threads on your existing shower arm or the new shower head, leading to persistent leaks or costly damage requiring professional repair. To avoid this, hand-tighten the shower head until it's snug, then use an adjustable wrench for just an additional quarter to half turn, stopping as soon as it feels secure.