Fact from Wikipedia
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.7
Pipe is available in rigid "joints", which come in various lengths depending on the material. Tubing, in particular copper, comes in rigid hard tempered "joints" or soft tempered (annealed) rolls. PeX and CPVC tubing also comes in rigid "joints" or flexible rolls. The temper of the copper, that is whether it is a rigid "joint" or flexible roll, does not affect the sizing.7
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.
Wall thickness does not affect pipe or tubing size.8 1/2" L copper has the same outer diameter as 1/2" K or M copper. The same applies to pipe schedules. As a result, a slight increase in pressure losses is realized due to a decrease in flowpath as wall thickness is increased. In other words, 1 foot of 1/2" L copper has slightly less volume than 1 foot of 1/2 M copper.citation needed
Demand for copper products has fallen due to the dramatic increase in the price of copper, resulting in increased demand for alternative products including PEX and stainless steel.
Overview of hydraulic kitchen
Connecting new equipment to the existing years of domestic water and sewage networks can prove problematic. Sometimes, when connecting the dishwasher, it turns out that in the kitchen, it is necessary to review the hydraulic system. We note, in fact, that we lack the approach of water, which could connect the dishwasher or water in the dishwasher is poured into the wrong pressure and a hose from the dishwasher starts dripping water. Then we called the plumber replace the existing water in the kitchen approach and to do a new approach, which will connect the dishwasher. It may also be that the water pouring into the dishwasher with too much pressure caused in it a failure, which can help us repair plumber and mechanic of the dishwashers.
Connecting the sink next to the water and sewage networks
After a time, use the bathroom we want to carry out any changes to it. Therefore we decide to buy a new bathtub. Sometimes such exchange of passes without any problems. Sometimes, however, it must be connected to a hot water supply and sanitation with the new connection, which must be done by a plumber. Then you can connect even with the need to chisel tiles to be able to perform such a connection, which will surely be reliable. Similarly, in case of replacement of the bathtub for a shower especially if our network plumbing is old materials Coupling. In recent years it has become fashionable also connect to the network plumbing the shower tray and another sink, where we can eg.