Elegance is the name of the game with modern bathrooms. To keep up with the demands of the public, the plumbing codes and standards have changed regarding modern bathrooms. Some changes are for the good; others, well, we will have to see.
The obsolete overflow
One of the first major changes you should be aware of is to elegant bathtubs and whirlpool tubs. Some of the newer his-and-her bathtubs can hold up to 300 gallons of water, while others, a mere 80 gallons. When you fill a bathtub this large, the tub filler has to be flowing at a high flow rate. This requires either a 3/4- or 1-inch water line to fill the tub. Some modern tub fillers will flow 12 to 15 gpm, or higher.