You should know it - pipes

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A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow ? liquids and gases (fluids), slurries, powders and masses of small solids.

It can also be used for structural applications; hollow pipe is far stiffer per unit weight than solid members. In common usage the words pipe and tube are usually interchangeable, but in industry and engineering, the terms are uniquely defined.

Depending on the applicable standard to which it is manufactured, pipe is generally specified by a nominal diameter with a constant outside diameter (OD) and a schedule that defines the thickness.
Tube is most often specified by the OD and wall thickness, but may be specified by any two of OD, inside diameter (ID), and wall thickness. Pipe is generally manufactured to one of several international and national industrial standards.1 While similar standards exist for specific industry application tubing, tube is often made to custom sizes and a broader range of diameters and tolerances.

Many industrial and government standards exist for the production of pipe and tubing.

The term "tube" is also commonly applied to non-cylindrical sections, i.e., square or rectangular tubing. In general, "pipe" is the more common term in most of the world, whereas "tube" is more widely used in the United States. Źródło: https://en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

Wikipedia about tubes and pipes and how they are different

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. 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. 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.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.Źródło: https://en.wikipedia.org/wiki/Plumbing

The costs of home plumbing work

Recommended plumber will be primarily one that is known for its reliable execution of their work.
High attention is paid also to the terms under which the plumber may undertake to perform the outsourced tasks themselves.

Subsequently, also looks at the amount of fees that are charged for by him made by its services and its personal culture and approach to the client.

It is known that the work hydraulics can occur for a variety of unforeseen circumstances, therefore customers also evaluate the way in which he was able to overcome such.
Unforeseen water leakage.
Usually, the total price for the service is determined based on the type of failure, which is a plumber and fix the number of hours spent at the customer's home..

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