For expert commercial and residential plumbing services in the Seattle area, contact Best Plumbing. We’re locally owned and operated, and have been in business for 50 years. Our technicians take great pride in providing the very best plumbing assessments, solutions and quality products, and our customer service and general expertise is unparalleled. Call today to discover why customers trust us for all their plumbing needs, large or small!
Present-day water-supply systems use a network of high-pressure pumps, and pipes in buildings are now made of copper, brass, plastic (particularly cross-linked polyethylene called PEX, which is estimated to be used in 60% of single-family homes), or other nontoxic material. Due to its toxicity, most cities moved away from lead water-supply piping by the 1920s in the United States, although lead pipes were approved by national plumbing codes into the 1980s, and lead was used in plumbing solder for drinking water until it was banned in 1986. Drain and vent lines are made of plastic, steel, cast-iron, or lead.
The introduction of the first water-retaining traps or seals in the 1850s, and the common use of "U"-shaped traps in the 1870s, were major steps forward. The design of the trap ensured that enough water remained in it to effectively block the passage of sewer gas back through the plumbing fixtures. During the 1870s vent pipes were introduced. They not only carried sewer gas out of the system, but also broke the suction created by movement of liquid in the pipes and eliminated the possibility of siphoning water that sealed the traps.
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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?