Apprentice plumber: Apprenticeship programs generally provide the most comprehensive training for novice plumbers. Either union locals and their affiliated companies or nonunion contractor organizations can administer this training. Apprenticeships typically consist of at least three to four years of paid, on-the-job training and some hours of related classroom instruction.
The most common residential drain to cause problems is the kitchen sink drain. Food particles, grease, soap or detergent build up can all, over time, slow down or completely block the flow of water down to the septic or sewer system. A garbage disposal as well as an installed dishwasher add more pipes to the mix which create more potential for clogs.
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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?