Editing Plumbing (section)

== Systems ==
[[File:Cu pipe leonard.jpg|thumb|[[Copper]] piping system in a building]]
The major categories of plumbing systems or subsystems are:<ref>{{cite web|title=Basic Plumbing System|url=http://www.slideshare.net/haroldtaylor1113/10-basic-plumbing-system|access-date=January 4, 2016|date=January 13, 2013}}</ref>
* potable cold and hot [[tap water]] supply
* [[plumbing drainage venting]]
* [[sewage system]]s and [[septic system]]s with or without [[hot water heat recycling]] and [[graywater]] recovery and treatment systems
* Rainwater, surface, and subsurface water drainage
* [[fuel gas]] piping
* [[hydronics]], i.e. heating and cooling systems using water to transport thermal energy, as in [[district heating]] systems, like for example the [[New York City steam system]].