The difference between pipes and tubes is simply in the way it is sized. PVC pipe for plumbing applications and galvanized steel pipe for instance, are measured in IPS (iron pipe size). Copper tube, CPVC, PeX and other tubing is measured nominally, which is basically an average diameter. These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them. When used in agricultural irrigation, the singular form "pipe" is often used as a plural.
PVC/CPVC – rigid plastic pipes similar to PVC drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970. PVC stands for polyvinyl chloride, and it has become a common replacement for metal piping. PVC should be used only for cold water, or for venting. CPVC can be used for hot and cold potable water supply. Connections are made with primers and solvent cements as required by code.
An apprenticeship is the most common pathway to becoming a plumber. Many unions and businesses mandate that an apprentice receive a minimum of 246 hours of technical education, which could include instruction in math, applied physics and chemistry, and up to 2,000 hours of paid, practical training working with an experienced plumber. Safety training is also an important component of the process, since injuries are common in this line of work. "We have many hours worth of [Occupational Safety and Health Administration] training before we go on to a job site," says Patrick Kellett, the administrative assistant to the general president for the United Association of Journeymen and Apprentices of the Plumbing, Pipe Fitting Industry of the United States, Canada and Australia. "We're very conscious of the dangers that come with working in construction."
Scott was very knowledgeable and happy to test out all items of my finikie hot water heater. He called in tech support and tested pressures and did a vent pipe test to check air flow. How do I know this, because he explained everything to me. One afternoon with him, and I could be a tech. All joking aside. I appreciate the continued support of Atomic. Scott's professionalism and willingness to keep me in the loop is spot on. Thanks Scott.
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.