The thicknesses of the water pipe and tube walls can vary. Pipe wall thickness is denoted by various schedules or for large bore polyethylene pipe in the UK by the Standard Dimension Ratio (SDR), defined as the ratio of the pipe diameter to its wall thickness. Pipe wall thickness increases with schedule, and is available in schedules 20, 40, 80, and higher in special cases. The schedule is largely determined by the operating pressure of the system, with higher pressures commanding greater thickness. Copper tubing is available in four wall thicknesses: type DWV (thinnest wall; only allowed as drain pipe per UPC), type 'M' (thin; typically only allowed as drain pipe by IPC code), type 'L' (thicker, standard duty for water lines and water service), and type 'K' (thickest, typically used underground between the main and the meter). Because piping and tubing are commodities, having a greater wall thickness implies higher initial cost. Thicker walled pipe generally implies greater durability and higher pressure tolerances.
Outstanding, friendly, reasonably priced, and professional work! Atomic Plumbing provided excellent service from the timely response, to my call to updates prior to their arrival time, to the actual work conducted on site. They provided me with options and didn't try and strong arm us into service we didn't need. They stayed with us until we could verify the service was complete (and the toilet didn't back up again) and ensured we had peace of mind about the work that was done before they left. I asked for additional service to be completed on the upstairs bathroom shower and the technician, James M., provided an initial assessment for free and gave me options. Once I determined it was going to need his expertise, he quickly and efficiently got to work and fixed that problem too. They were military friendly and provided me a 10% discount which for a family of five on a single income, every little bit helps! I would STRONGLY recommend Atomic over the other guys any day of the week! Thank you Atomic! -Nick R.
Most plumbers, pipefitters, and steamfitters learn their trade through a 4- or 5-year apprenticeship. Apprentices typically receive 2,000 hours of paid on-the-job training, as well as some classroom instruction, each year. In the classroom, apprentices learn safety, local plumbing codes and regulations, and blueprint reading. They also study mathematics, applied physics, and chemistry. Apprenticeship programs are offered by unions and businesses. Although most workers enter apprenticeships directly, some start out as helpers. The Home Builders Institute offers a pre-apprenticeship training program in plumbing and other trades.

Plumbing Repair