Abstract:

Internal water – system pipes and devices that provide water supply to sanitary devices in the building. Today in the construction of internal water supply system uses a wide variety of water pipes. Water tubes are divided into two large categories. Metal pipes include: steel; tubes of "steel"; copper. For non-metallic pipes include: plastic; polypropylene; polyethylene; crosslinked polyethylene; a PVC pipe.

Keywords: exponential law., reliability, flow, speed, diameter, pressure, losses, non-metallic, metal, pipe material, water, plumbing