I am renovating my house and I have 1/2 copper that feeds the 2nd floor shower and 3rd floor apartment with shower, kitchen, dishwasher and washing machine. Do I need a larger line going to the 2nd or 3rd floor? I was going to add a pressure booster in the basement. Will that suffice?
Another question is I am replacing my shower faucets with balanced pressure devices. If the pressure is not even with myhot and cold will I have a problem? Currently I have to turn the hot all the way open and the cold just a little bit. Increasing the temp at the hot water tank does not seem to make a difference.
Preferably you would want 1 inch from the main, 3/4 inch in the house then 1/2 inch branching off to the fixtures. This keeps the pressure more ocnsistant when multiple fixtures are in use. Less liklihood of scalding hot showeer when toilet is flushed. Mine has 1/2 throughout form the main probably installed by the original buider who did averything himself apparently without researching first. I have lived with it for 14 years but would eventually like to replace with 3/4 PEX to improve pressure.