Beginning in the 1950s plastic pipe, most notably that made of polyvinyl chloride, has been used in ever increasing amounts. In the following decades, other plastics were introduced into pipe manufacture. However, by the last years of the century a number of plastic-pipe failures had occurred. Problems were attributed to defective manufacture and, in some cases, a chemical reaction taking place between the material used to make the pipe and chlorine in the water that it carried. These events led to class action lawsuits and a general reevaluation of the use of this inexpensive and easily worked alternative piping material.
Plumbing—from fixtures to vent pipes—in high-rise buildings and skyscrapers duplicated that used in other structures, but with the addition of several unique features. As gravity-fed city mains generally lift water no more than five or six stories, electrically operated pumps raise it to elevated storage tanks beyond that point. Water levels in the tanks are maintained automatically. Water is supplied from them throughout the structure by gravity, air pressure, or booster pumps. Likewise, gravity removes waste water by way of drainage pipes.
I was disappointed with the pressure of a tub and shower that were plumbed with 1/2 supply lines (2nd floor). Could be low pressure from the street, but I want to replace with 5/8. Plus, I'd like to have 2 back to back showers, one inside and one outside. So, I had intended to bring a 1 supply to both, then branch up to valves and shower head with 5/8. Finally, I thought pressure from the street was typically 55 to 70 psi and I am concerned if pvc can take that.Any thoughts?

Rooter Plumbing