If your home has Galvanized piping and is over 40 years old, or notice symptoms like pressure reduction when more than one thing is on. You may want to look into repiping your waterlines. Other issues such as a variety of twists, turns, and no know how can have effects on performance also.
Minerals in your water have chemical reactions with minerals in your piping causing issues such as rust. Sediment deposits show up in places like your water heater reduceing efficiency and costing you money. Repiping is done in a variety of materials like Copper, CPVC and Aquapex tubing. Each kind of piping has its own unique attributes and pros and cons.