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. Both "pipe" and "tube" imply a level of rigidity and permanence, whereas a hose (or hosepipe) is usually portable and flexible.Pipe assemblies are almost always constructed with the use of fittings such as elbows, tees, and so on, while tube may be formed or bent into custom configurations. For materials that are inflexible, cannot be formed, or where construction is governed by codes or standards, tube assemblies are also constructed with the use of tube fittings.Źródło: https://en.wikipedia.org/wiki/Pipe_(fluid_conveyance)
Counter water must be installed by an authorized plumber who will also make his sealing.In case of any doubt, will also check a meter on the water especially when he suddenly began to show much higher water consumption than before.
Usually installed in the boiler room is also a boiler, water heater.After its installation, the current home plumber, could also make his first start and check thanks to proper operation. Household members will be happy with such a solution, especially if the first use of the gas boiler..